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    570 vulnerabilities by Discourse

    CVE-2026-47264 (GCVE-0-2026-47264)

    Vulnerability from nvd – Published: 2026-06-12 20:26 – Updated: 2026-06-13 03:31
    VLAI
    Title
    Discourse: Don't leak restricted tag group names via tag info
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, DetailedTagSerializer#tag_group_names returned every tag group a tag belonged to without filtering against the requesting user's visibility. With SiteSetting.tags_listed_by_group enabled, anonymous and unprivileged users hitting TagsController#info (which is exempt from requires_login) could read the names of tag groups restricted to specific user groups or non-visible categories. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-47263 (GCVE-0-2026-47263)

    Vulnerability from nvd – Published: 2026-06-12 20:26 – Updated: 2026-06-15 19:28
    VLAI
    Title
    Discourse: Prevent webhook payload disclosure on event redelivery
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /web_hook_events/<id> in Jobs::RedeliverWebHookEvents did not pass group_ids, leaving the channel readable by any authenticated user (or anonymous user on instances where login_required is disabled). Webhook IDs are sequential integers and trivially enumerable. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-45775 (GCVE-0-2026-45775)

    Vulnerability from nvd – Published: 2026-06-12 20:25 – Updated: 2026-06-15 13:04
    VLAI
    Title
    Discourse: Cross-site backup access via path traversal in multisite local backups
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a path traversal vulnerability in Discourse backup handling could allow an authenticated administrator on one site in a multisite deployment to access backup files belonging to another site when backups are stored locally. In affected configurations, an admin on Site A could potentially retrieve sensitive backup data from Site B (same host, multisite) by crafting a backup download request with a traversal payload. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-45085 (GCVE-0-2026-45085)

    Vulnerability from nvd – Published: 2026-06-12 20:25 – Updated: 2026-06-15 18:48
    VLAI
    Title
    Discourse: Chat misauthorization and information disclosure
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, four authorization/disclosure issues in the chat plugin (one also involving discourse-calendar): read-only category users could create chat threads, self-deleted chat messages could be restored by their author after channel access was revoked, moderators reviewing a flagged chat message were shown the channel's current last_message (often unrelated DM content), and calendar event payloads exposed the attached chat channel and its last message to viewers without chat access (including anonymous users). This affects sites with the chat plugin enabled; the calendar issue additionally requires discourse-calendar. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-862 - Missing Authorization
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44786 (GCVE-0-2026-44786)

    Vulnerability from nvd – Published: 2026-06-12 20:22 – Updated: 2026-06-15 16:06
    VLAI
    Title
    Discourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus subscriber without chat enabled could receive chat message payloads in real time. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44785 (GCVE-0-2026-44785)

    Vulnerability from nvd – Published: 2026-06-12 20:24 – Updated: 2026-06-15 18:04
    VLAI
    Title
    Discourse: Hidden reply-to post raw can be disclosed through AI explain prompts
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the AI "explain" helper only checks can_see? on the post being explained, not its reply_to_post, so any authenticated user with access to the AI helper could read the raw contents of a hidden parent post by invoking "Explain" on a reply to it. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44784 (GCVE-0-2026-44784)

    Vulnerability from nvd – Published: 2026-06-12 20:23 – Updated: 2026-06-13 03:29
    VLAI
    Title
    Discourse: Non-staff group owners can see email password in plaintext through group history
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, group owners who are not necessarily admins or moderators can view a group's outgoing email/SMTP credentials in plaintext via the group history log (/groups/:name/logs.json). Affected fields: email_password, email_username, smtp_server, smtp_port, smtp_ssl_mode. The most sensitive item is the SMTP password, which an owner could use to send mail as the group from outside Discourse. This impacts sites that have configured per-group SMTP credentials and granted group ownership to users who should not have access to those credentials. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44783 (GCVE-0-2026-44783)

    Vulnerability from nvd – Published: 2026-06-12 20:23 – Updated: 2026-06-15 19:28
    VLAI
    Title
    Discourse: Replying to a whisper lets non-whisperers create staff-only whisper posts
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a flaw in how replies to whisper posts are handled allows authenticated users outside the groups configured in whispers_allowed_groups to post into a topic's staff-only whisper channel. The injected content is visible to whisperers (typically staff) alongside legitimate whispers. Only sites that have whispers enabled are affected. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-284 - Improper Access Control
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44782 (GCVE-0-2026-44782)

    Vulnerability from nvd – Published: 2026-06-12 20:23 – Updated: 2026-06-15 13:03
    VLAI
    Title
    Discourse: GroupPostSerializer leaks hidden full names through reaction post association
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, GroupPostSerializer declared include_user_long_name? as the predicate for its :name attribute, but AMS looks for include_name?. The misnamed predicate was never called, so object.user.name was always serialized regardless of SiteSetting.enable_names. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44780 (GCVE-0-2026-44780)

    Vulnerability from nvd – Published: 2026-06-12 20:22 – Updated: 2026-06-15 18:50
    VLAI
    Title
    Discourse: Category queue reviewers can read raw incoming emails from queued posts
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, ReviewableQueuedPostSerializer unconditionally included payload["raw_email"] for posts that arrived via incoming email. Category moderation group members reaching the review queue could therefore read the full inbound email source (headers, sender trace, MUA, body) without being in view_raw_email_allowed_groups — the trust boundary that gates the dedicated raw-email endpoint. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.1.0-latest, < 2026.1.4
    Create a notification for this product.
    Show details on NVD website

    {
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    CVE-2026-44779 (GCVE-0-2026-44779)

    Vulnerability from nvd – Published: 2026-06-12 20:22 – Updated: 2026-06-15 18:05
    VLAI
    Title
    Discourse: Bot debug endpoints disclose whisper translation audit logs
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, bot debug endpoints disclose whisper translation audit logs. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-34154 (GCVE-0-2026-34154)

    Vulnerability from nvd – Published: 2026-05-19 18:41 – Updated: 2026-05-19 20:05
    VLAI
    Title
    Discourse has a subscription access bypass in its discourse-subscriptions plugin
    Summary
    Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, a vulnerability in the discourse-subscriptions plugin allows users to gain access to subscription-gated groups without completing payment. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.5.0-latest, < 2026.5.0-latest.1
    Create a notification for this product.
    Show details on NVD website

    {
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    CVE-2026-33514 (GCVE-0-2026-33514)

    Vulnerability from nvd – Published: 2026-05-19 00:59 – Updated: 2026-05-19 12:09
    VLAI
    Title
    Discourse: Information Disclosure in Form Template API Due to Missing Authorization
    Summary
    Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, an authenticated user on a Discourse instance with the form templates feature enabled can read the name and structured content of form templates that are intended exclusively for categories they are not authorized to access. Impact is limited to disclosure of site configuration metadata. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.5.0-latest , < 2026.5.0-latest.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-32244 (GCVE-0-2026-32244)

    Vulnerability from nvd – Published: 2026-05-19 00:04 – Updated: 2026-05-19 16:27
    VLAI
    Title
    Discourse: Cached outdated summaries can leak removed content
    Summary
    Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, outdated cached AI summaries can leak removed content to anonymous and unprivileged users who cannot regenerate summaries. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1. To work around this issue, restrict summary generation by tightening the allowed groups on the summarization Personas.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-524 - Use of Cache Containing Sensitive Information
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    • CWE-672 - Operation on a Resource after Expiration or Release
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.5.0-latest, < 2026.5.0-latest.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-34947 (GCVE-0-2026-34947)

    Vulnerability from nvd – Published: 2026-04-03 21:27 – Updated: 2026-04-07 14:17
    VLAI
    Title
    Discourse: Staged user custom fields are exposed on public invite pages
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, staged user custom fields and username are exposed on public invite pages without email verification. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.3
    Affected: >= 2026.2.0-latest, < 2026.2.2
    Affected: >= 2026.3.0-latest, < 2026.3.0
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-27481 (GCVE-0-2026-27481)

    Vulnerability from nvd – Published: 2026-04-03 21:27 – Updated: 2026-04-07 14:18
    VLAI
    Title
    Discourse: Hidden tag visibility bypass on tag routes
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.3, 2026.2.0-latest to before 2026.2.2, and 2026.3.0-latest to before 2026.3.0, an authorization bypass vulnerability allows unauthenticated or unauthorized users to view hidden (staff-only) tags and its associated data. All Discourse instances with tagging enabled and staff-only tag groups configured are impacted. This issue has been patched in versions 2026.1.3, 2026.2.2, and 2026.3.0.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.3
    Affected: >= 2026.2.0-latest, < 2026.2.2
    Affected: >= 2026.3.0-latest, < 2026.3.0
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-47264 (GCVE-0-2026-47264)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:26 – Updated: 2026-06-13 03:31
    VLAI
    Title
    Discourse: Don't leak restricted tag group names via tag info
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, DetailedTagSerializer#tag_group_names returned every tag group a tag belonged to without filtering against the requesting user's visibility. With SiteSetting.tags_listed_by_group enabled, anonymous and unprivileged users hitting TagsController#info (which is exempt from requires_login) could read the names of tag groups restricted to specific user groups or non-visible categories. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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            }
          ],
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    CVE-2026-47263 (GCVE-0-2026-47263)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:26 – Updated: 2026-06-15 19:28
    VLAI
    Title
    Discourse: Prevent webhook payload disclosure on event redelivery
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the MessageBus.publish call for /web_hook_events/<id> in Jobs::RedeliverWebHookEvents did not pass group_ids, leaving the channel readable by any authenticated user (or anonymous user on instances where login_required is disabled). Webhook IDs are sequential integers and trivially enumerable. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-45775 (GCVE-0-2026-45775)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:25 – Updated: 2026-06-15 13:04
    VLAI
    Title
    Discourse: Cross-site backup access via path traversal in multisite local backups
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a path traversal vulnerability in Discourse backup handling could allow an authenticated administrator on one site in a multisite deployment to access backup files belonging to another site when backups are stored locally. In affected configurations, an admin on Site A could potentially retrieve sensitive backup data from Site B (same host, multisite) by crafting a backup download request with a traversal payload. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-22 - Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-45085 (GCVE-0-2026-45085)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:25 – Updated: 2026-06-15 18:48
    VLAI
    Title
    Discourse: Chat misauthorization and information disclosure
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, four authorization/disclosure issues in the chat plugin (one also involving discourse-calendar): read-only category users could create chat threads, self-deleted chat messages could be restored by their author after channel access was revoked, moderators reviewing a flagged chat message were shown the channel's current last_message (often unrelated DM content), and calendar event payloads exposed the attached chat channel and its last message to viewers without chat access (including anonymous users). This affects sites with the chat plugin enabled; the calendar issue additionally requires discourse-calendar. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-862 - Missing Authorization
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44785 (GCVE-0-2026-44785)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:24 – Updated: 2026-06-15 18:04
    VLAI
    Title
    Discourse: Hidden reply-to post raw can be disclosed through AI explain prompts
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, the AI "explain" helper only checks can_see? on the post being explained, not its reply_to_post, so any authenticated user with access to the AI helper could read the raw contents of a hidden parent post by invoking "Explain" on a reply to it. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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            }
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    CVE-2026-44784 (GCVE-0-2026-44784)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:23 – Updated: 2026-06-13 03:29
    VLAI
    Title
    Discourse: Non-staff group owners can see email password in plaintext through group history
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, group owners who are not necessarily admins or moderators can view a group's outgoing email/SMTP credentials in plaintext via the group history log (/groups/:name/logs.json). Affected fields: email_password, email_username, smtp_server, smtp_port, smtp_ssl_mode. The most sensitive item is the SMTP password, which an owner could use to send mail as the group from outside Discourse. This impacts sites that have configured per-group SMTP credentials and granted group ownership to users who should not have access to those credentials. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44783 (GCVE-0-2026-44783)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:23 – Updated: 2026-06-15 19:28
    VLAI
    Title
    Discourse: Replying to a whisper lets non-whisperers create staff-only whisper posts
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, a flaw in how replies to whisper posts are handled allows authenticated users outside the groups configured in whispers_allowed_groups to post into a topic's staff-only whisper channel. The injected content is visible to whisperers (typically staff) alongside legitimate whispers. Only sites that have whispers enabled are affected. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-284 - Improper Access Control
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44782 (GCVE-0-2026-44782)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:23 – Updated: 2026-06-15 13:03
    VLAI
    Title
    Discourse: GroupPostSerializer leaks hidden full names through reaction post association
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, GroupPostSerializer declared include_user_long_name? as the predicate for its :name attribute, but AMS looks for include_name?. The misnamed predicate was never called, so object.user.name was always serialized regardless of SiteSetting.enable_names. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44780 (GCVE-0-2026-44780)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:22 – Updated: 2026-06-15 18:50
    VLAI
    Title
    Discourse: Category queue reviewers can read raw incoming emails from queued posts
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, ReviewableQueuedPostSerializer unconditionally included payload["raw_email"] for posts that arrived via incoming email. Category moderation group members reaching the review queue could therefore read the full inbound email source (headers, sender trace, MUA, body) without being in view_raw_email_allowed_groups — the trust boundary that gates the dedicated raw-email endpoint. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.1.0-latest, < 2026.1.4
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44779 (GCVE-0-2026-44779)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:22 – Updated: 2026-06-15 18:05
    VLAI
    Title
    Discourse: Bot debug endpoints disclose whisper translation audit logs
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, bot debug endpoints disclose whisper translation audit logs. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-44786 (GCVE-0-2026-44786)

    Vulnerability from cvelistv5 – Published: 2026-06-12 20:22 – Updated: 2026-06-15 16:06
    VLAI
    Title
    Discourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users
    Summary
    Discourse is an open-source discussion platform. From versions 2026.1.0-latest to before 2026.1.4, 2026.3.0-latest to before 2026.3.1, and 2026.4.0-latest to before 2026.4.1, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus subscriber without chat enabled could receive chat message payloads in real time. This issue has been patched in versions 2026.1.4, 2026.3.1, 2026.4.1, and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: >= 2026.1.0-latest, < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-34154 (GCVE-0-2026-34154)

    Vulnerability from cvelistv5 – Published: 2026-05-19 18:41 – Updated: 2026-05-19 20:05
    VLAI
    Title
    Discourse has a subscription access bypass in its discourse-subscriptions plugin
    Summary
    Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, a vulnerability in the discourse-subscriptions plugin allows users to gain access to subscription-gated groups without completing payment. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.5.0-latest, < 2026.5.0-latest.1
    Create a notification for this product.
    Show details on NVD website

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    CVE-2026-33514 (GCVE-0-2026-33514)

    Vulnerability from cvelistv5 – Published: 2026-05-19 00:59 – Updated: 2026-05-19 12:09
    VLAI
    Title
    Discourse: Information Disclosure in Form Template API Due to Missing Authorization
    Summary
    Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, an authenticated user on a Discourse instance with the form templates feature enabled can read the name and structured content of form templates that are intended exclusively for categories they are not authorized to access. Impact is limited to disclosure of site configuration metadata. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1.
    SSVC
    Exploitation: none Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.5.0-latest , < 2026.5.0-latest.1
    Create a notification for this product.
    Show details on NVD website

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          "source": {
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            "discovery": "UNKNOWN"
          },
          "title": "Discourse: Information Disclosure in Form Template API Due to Missing Authorization"
        }
      },
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        "assignerShortName": "GitHub_M",
        "cveId": "CVE-2026-33514",
        "datePublished": "2026-05-19T00:59:53.307Z",
        "dateReserved": "2026-03-20T16:59:08.891Z",
        "dateUpdated": "2026-05-19T12:09:34.589Z",
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    CVE-2026-32244 (GCVE-0-2026-32244)

    Vulnerability from cvelistv5 – Published: 2026-05-19 00:04 – Updated: 2026-05-19 16:27
    VLAI
    Title
    Discourse: Cached outdated summaries can leak removed content
    Summary
    Discourse is an open-source discussion platform. In versions prior to 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1, outdated cached AI summaries can leak removed content to anonymous and unprivileged users who cannot regenerate summaries. This issue has been fixed in versions 2026.1.4, 2026.3.1, 2026.4.1 and 2026.5.0-latest.1. To work around this issue, restrict summary generation by tightening the allowed groups on the summarization Personas.
    SSVC
    Exploitation: none Automatable: yes Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-524 - Use of Cache Containing Sensitive Information
    • CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
    • CWE-672 - Operation on a Resource after Expiration or Release
    Assigner
    References
    Impacted products
    Vendor Product Version
    discourse discourse Affected: < 2026.1.4
    Affected: >= 2026.3.0-latest, < 2026.3.1
    Affected: >= 2026.4.0-latest, < 2026.4.1
    Affected: >= 2026.5.0-latest, < 2026.5.0-latest.1
    Create a notification for this product.
    Show details on NVD website

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