Open Source Threat Intelligence Platform & Open Standards For Threat Information Sharing
- Website
- https://www.misp-project.org
- License
- GNU Affero General Public License v3.0 or later
- CPE product names
- mispmisp-projectmisp_projectmalware_information_sharing_platform
CVE-2026-88915 (GCVE-0-2026-88915)
Vulnerability from cvelistv5 – Published: 2026-09-10 13:04 – Updated: 2026-09-10 17:33
VLAI
EPSS
VEX
Title
MISP Event Template Instantiation Bypasses Sharing Group and Tagging Authorization
Summary
Affected versions of MISP do not consistently enforce the acting user's authorization when instantiating event templates.
For templates using distribution = 4, the template can specify a sharing_group_id. The instantiation path passed that value into event creation without verifying that the user instantiating the template was actually permitted to use the selected sharing group. The commit notes that Event::_add() only performed its own sharing-group authorization in another code path, leaving template instantiation able to write the identifier directly.
The same instantiation path also attached template-specified tags without checking the user's normal tagging permissions. In addition, it hardcoded local => 0, meaning tags marked local_only could be attached globally and consequently propagate through synchronization or export, contrary to their intended restriction.
The fix adds explicit SharingGroup::canUse() authorization for the acting user, applies the same tag-modification checks used by normal event tagging, and ensures local_only tags are attached locally.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 17:32 UTC
CWE
- CWE-862 - Missing Authorization
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/3aa3a9a97 | patch |
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CVE-2026-88921 (GCVE-0-2026-88921)
Vulnerability from cvelistv5 – Published: 2026-09-10 13:41 – Updated: 2026-09-10 17:02
VLAI
EPSS
VEX
Title
MISP: Unescaped HTML Injection in PDF Report Element Rendering
Summary
MISP contains an HTML injection vulnerability in the MISPElementHTMLFormatterTool component, which is responsible for rendering MISP element references (attributes, objects, and tags) into inline HTML during PDF report export via the convert_markdown_to_pdf module. The attribute(), objectAttribute(), object(), and tag() methods interpolated user-controlled fields (attribute type, attribute value, object name, object relation, tag name, tag colour, and tag text colour) directly into HTML templates without applying HTML entity encoding. An authenticated user with the ability to create or modify MISP attributes, objects, or tags could embed arbitrary HTML markup in these fields. When a report containing such elements was exported to PDF, the unescaped content was rendered as live HTML rather than inert text, potentially injecting script tags, breaking the document structure, or altering the visual content of the exported report. Additionally, the attribute() method contained a template with hardcoded sample values ("domain-ip" and "google.com") instead of format placeholders, meaning every plain attribute reference in a PDF displayed the sample text rather than the actual indicator value, constituting a data-integrity defect in the exported document. The vulnerability requires an authenticated actor with write access to MISP elements and a subsequent PDF export of a report referencing those elements. The security impact is primarily to the integrity of the exported document and, depending on the HTML-to-PDF rendering engine, potential execution of injected markup during the conversion step.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 17:01 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/949744a4b | patch |
Impacted products
GCVE extensions
AI-generated
Not human-reviewed
Draft
Confidence: medium
Model
qwen3.8:27b
advisory
bcp-05-x-01bcp-05-x-02
AI involvement
GCVE-BCP-05-X-01
Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.
ai-computer-assisted:llm-generatedai-computer-assisted:classification
| Model | Source | Identifier |
|---|---|---|
| qwen3.8:27b | ollama | qwen3.8:27b |
Patch provenance
GCVE-BCP-05-X-02
This metadata was derived automatically from a patch and is still a draft: human review is required before it can be considered authoritative.
- Generator
-
patch2vuln.pyon 2026-09-10 13:06 - Model
qwen3.8:27b- Input
-
https://github.com/MISP/MISP/commit/949744a4b.patch
300efd40407c… - Confidence
- medium
| Commit | Subject | Patch SHA-256 |
|---|---|---|
949744a4b6de
|
fix: [event-report] Render and escape MISP element references | 300efd40407c… |
Fix summary
The fix applies HTML entity encoding (via the h() helper, which wraps htmlspecialchars with ENT_QUOTES and UTF-8) to every user-controlled value interpolated into the HTML templates in the MISPElementHTMLFormatterTool. This ensures that attribute types, values, object names, relations, tag names, and colour values are treated as inert data and cannot inject markup or break out of the surrounding span/style context. The hardcoded sample values in the attribute() template are replaced with proper %s format placeholders so that the actual element data is rendered. Comprehensive unit tests are added to verify both correct rendering and escaping of hostile inputs across all four formatter methods.
Patch summary
In MISPElementHTMLFormatterTool.php: (1) the attribute() template's hardcoded 'domain-ip' and 'google.com' strings are replaced with %s placeholders; (2) all sprintf arguments in attribute(), objectAttribute(), object(), and tag() are wrapped with h() to HTML-encode the interpolated values (attribute type, value, object name, object_relation, tag name, colour, text_colour). A new test file MISPElementHTMLFormatterToolTest.php is added with 123 lines of PHPUnit tests covering: correct rendering of real values, HTML escaping of hostile payloads (script tags, span-breaking sequences, CSS attribute breakout via quotes), foreign-tag detection, and placeholder behaviour for objects without attributes.
CVSS rationale
AV:N: MISP is a network-accessible web application. AC:L: The attacker only needs to create or modify a MISP element with a crafted value; no race conditions or special timing are required. AT:N: No manipulation of the attack target is needed. PR:L: The attacker requires an authenticated account with permission to create or modify MISP attributes, objects, or tags. UI:N: The victim performs a normal, expected action (exporting a report to PDF); no unusual interaction is required to trigger the rendering of the injected content. VC:N: The primary impact is on the output document, not on reading confidential system data. VI:L: The integrity of the exported PDF is compromised by injected markup or incorrect data (hardcoded sample values). VA:N: No denial-of-service impact is evident. SC:N: No confirmed cross-system confidentiality impact. SI:L: The integrity of the exported document (a secondary asset) is affected; injected content could mislead readers or, if the PDF renderer executes scripts, affect the rendering environment. SA:N: No security-relevant impact on other systems is established by the evidence.
Weakness rationale
- CWE-79 User-controlled MISP element values (attribute values, object names, tag names, tag colours) are interpolated into HTML output without encoding, allowing injection of arbitrary HTML markup into the rendered document. Although the output target is a PDF rather than a browser page, the mechanism is identical to stored XSS: untrusted data is embedded in an HTML context without neutralization.
- CWE-116 The root cause is the absence of output encoding (htmlspecialchars) on all interpolated values in the HTML template strings. The tag() method additionally failed to escape colour values that are placed inside a CSS style attribute, enabling attribute-breakout injection.
Assumptions to verify
- The HTML-to-PDF rendering pipeline (convert_markdown_to_pdf) is assumed to render the generated HTML in a context where injected markup could be interpreted (e.g., headless browser or HTML-aware converter); if a purely static renderer is used, the impact is limited to document corruption.
- The attacker is assumed to have an authenticated MISP account with write access to attributes, objects, or tags; the specific role or permission level required is not stated in the patch.
- The exact fixed version is not specified in the patch metadata; the tag boundary (v2.5.46, 187 commits before the fix) indicates the fix post-dates v2.5.46 but the precise release is unknown.
- UI:N is assigned on the assumption that triggering the PDF export is a normal, expected user action and does not constitute a special interaction requirement beyond routine use of the application.
Model comparison
Selected qwen3.8:27b
by deterministic-consensus-v1
The selected result is closest to model consensus; this heuristic does not establish factual correctness and human review remains required.
| Model | Score | Agreement | Confidence | Assumptions |
|---|---|---|---|---|
qwen3.8:27b |
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CVE-2026-85546 (GCVE-0-2026-85546)
Vulnerability from cvelistv5 – Published: 2026-09-04 09:27 – Updated: 2026-09-10 07:53
VLAI
EPSS
VEX
Title
MISP Sharing Group Quick-Edit Actions Allow CSRF via State-Changing GET Requests
Summary
MISP contains a cross-site request forgery (CSRF) vulnerability in the sharing group quick-edit functionality. The addOrg, removeOrg, addServer, and removeServer actions share the __initialiseSGQuickEdit() helper, where the HTTP method validation intended to restrict these operations to POST requests was commented out.
As a result, these state-changing actions could be invoked using GET requests. An attacker could craft a URL targeting one of the affected actions and cause an authenticated MISP user with sufficient privileges to request it, for example through a malicious link or embedded web resource.
Successful exploitation could modify the membership of a MISP sharing group without the victim intentionally performing the operation. Depending on the action performed, an attacker could add or remove organisations or servers from a sharing group, potentially granting unintended access to information distributed through that sharing group or disrupting legitimate information sharing.
The patch restores HTTP method enforcement centrally in __initialiseSGQuickEdit() by calling allowMethod(['post']), ensuring that all four affected quick-edit operations require POST requests and are therefore subject to the application's normal protections for state-changing requests.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-04 19:35 UTC
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/3060d93cb | patch |
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CVE-2026-86283 (GCVE-0-2026-86283)
Vulnerability from cvelistv5 – Published: 2026-09-06 14:15 – Updated: 2026-09-08 18:18
VLAI
EPSS
VEX
Title
MISP UiBeta Collection View Bypasses Event ACL, Exposing Unauthorized Event Data
Summary
MISP's UiBeta theme collection view (app/View/Themed/UiBeta/Collections/view.ctp) performed a secondary query of member events by UUID without applying the caller's access control list (ACL). The CollectionsController::view() action correctly resolved collection element UUIDs through Event::fetchSimpleEvents($user, ...), which enforces per-user event ACL. However, the view template independently re-queried the same UUIDs using only an Event.uuid IN (...) condition, omitting the createEventConditions() authorization filter. Because collection element UUIDs are stored without server-side authorization against the referenced event (CollectionElementsController::add() accepts whatever UUID the collection owner posts), an authenticated user with view access to a collection could retrieve full details of events they are not permitted to read. The exposed data included event identifiers, info, dates, timestamps, creator organization, all event tags, and galaxy clusters (the latter attached via a cluster-scoped rather than event-scoped ACL check). This constitutes an authorization bypass at the presentation layer, allowing horizontal privilege escalation across event boundaries within the MISP instance.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:18 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/44573e4a8 | patch |
GCVE extensions
AI-generated
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Model
qwen3.8:27b
advisory
bcp-05-x-01
AI involvement
GCVE-BCP-05-X-01
Draft vulnerability metadata was generated from a git-format patch using an Ollama-hosted language model. Human validation is required before publication.
ai-computer-assisted:llm-generatedai-computer-assisted:classification
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CVE-2026-86451 (GCVE-0-2026-86451)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:59 – Updated: 2026-09-08 14:52
VLAI
EPSS
VEX
Title
MISP Event Graph Object Reference Lookup Exposes References from Unauthorized Objects
Summary
Affected versions of MISP allow authenticated users to retrieve object-reference records by UUID through EventGraphTool::get_reference_data() without first checking whether the requester is authorized to view the object the reference belongs to.
The vulnerable code queried ObjectReference.uuid directly and returned the matching row whenever it existed. Because no parent-object ACL was applied, a user who knew or obtained a reference UUID could retrieve information associated with an object outside their normal access scope. The commit explicitly states that any object reference could be returned by UUID without authorizing its parent object.
The fix retrieves the referenced object's object_id and calls fetchObjectSimple() with the current user. If the user cannot access that parent object, MISP now returns NotFoundException instead of exposing the reference.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:52 UTC
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/c0cb5c9f8 | patch |
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CVE-2026-86441 (GCVE-0-2026-86441)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:39 – Updated: 2026-09-08 14:51
VLAI
EPSS
VEX
Title
MISP Dashboard Organisation Widgets Bypass Organisation-Index Restrictions and Expose Hidden Organisation Data
Summary
Affected versions of MISP contain inconsistent authorization checks across dashboard widgets that display organisation information.
Several organisation-related widgets did not honor Security.hide_organisation_index_from_users. As a result, authenticated users without the perm_sharing_group permission could enumerate organisations even though the normal organisation index was intentionally hidden from them.
The affected widgets included paths that:
*
returned organisation names and identifiers;
*
could expose additional organisation database fields through JSON export because unrestricted find('all') queries fetched full rows;
*
accepted limit=0 or negative values in a way that could effectively remove the result limit and return the entire organisation table.
A related organisation-contributor leaderboard also ignored the same visibility setting. Its handler counted Event.orgc_id across the entire event table and mapped those IDs to organisation names, revealing every organisation with events regardless of whether the caller could see any of those events. The fix withdraws this widget entirely for users who lack organisation-index visibility.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:51 UTC
CWE
Assigner
References
2 references
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CVE-2026-86440 (GCVE-0-2026-86440)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:35 – Updated: 2026-09-08 14:51
VLAI
EPSS
VEX
Title
MISP Dashboard Button Widget Allows Stored XSS via Unsafe javascript: and Backslash URLs
Summary
Affected versions of MISP insufficiently validate URLs used by dashboard widgets, particularly the Button widget.
The widget's URL is stored configuration controlled by a user. The previous renderer considered a URL safe if it appeared relative or if its parsed hostname matched the configured MISP hostname. That logic failed to reject dangerous schemes and URL forms that browsers normalize differently from PHP's URL parsing.
As a result, values such as javascript: URLs or backslash-based authority forms could reach the generated anchor's href and execute script or navigate to an attacker-controlled origin when another user interacted with the widget. The upstream commit describes the issue as:
“javascript: and backslash URLs reached the href (stored XSS)”.
The fix routes widget URLs through a shared DashboardURLValidator, rejects dangerous schemes, raw backslashes, control characters, and unauthorized absolute origins, and validates the URL both in the widget handler and renderer.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:51 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/adf704e94 | patch |
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CVE-2026-86419 (GCVE-0-2026-86419)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:31 – Updated: 2026-09-08 14:51
VLAI
EPSS
VEX
Title
MISP Insufficient Outbound URL Validation Allows SSRF and Credential Disclosure via Feed Redirects and TAXII Discovery
Summary
Affected versions of MISP contain insufficient validation of server-side outbound HTTP destinations in feed retrieval and TAXII discovery functionality.
In feed processing, redirects were followed without validating the redirect scheme or destination. The original request headers were reused across redirect hops, meaning authentication headers or API credentials configured for a feed could be forwarded to a different host. Redirects could also target internal network resources, resulting in SSRF. The fix adds redirect validation, blocks internal destinations for cross-host redirects, strips configured feed credentials before following redirects to another host, and pins validated DNS results to prevent re-resolution after validation.
The TAXII discovery endpoint had a related incomplete SSRF defense. It used gethostbyname() and compared the result against only a few literal addresses. This missed cases including IPv6 loopback (::1), numeric host encodings such as 0x7f000001, and potentially multiple DNS records. The fix moves TAXII discovery to the shared URL egress validator.
Together, these commits harden MISP's outbound URL handling against alternate-address representations, DNS-related bypasses, unsafe redirects, internal-host access, and cross-host credential forwarding.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:51 UTC
CWE
Assigner
References
2 references
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CVE-2026-86418 (GCVE-0-2026-86418)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:22 – Updated: 2026-09-08 14:50
VLAI
EPSS
VEX
Title
MISP Dashboard Organisation Picker Exposes Hidden Organisation Metadata to Unauthorized Users
Summary
Affected versions of MISP expose organisation metadata through the dashboard organisation picker without applying the same visibility restrictions enforced by the normal organisation index and per-organisation view.
The affected endpoint returned fields including:
*
organisation ID;
*
UUID;
*
name.
When Security.hide_organisation_index_from_users was enabled, normal organisation enumeration was restricted, but the dashboard picker still queried all organisations. This allowed authenticated users to discover organisations that should have remained hidden from them.
The fix calls Organisation::createConditions($this->Auth->user()) and appends the resulting ACL conditions to the picker query. Ordinary users are thereby limited to organisations associated with events or proposals they can already see, plus their own organisation, while users with the appropriate sharing-group privilege retain broader visibility.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:50 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/8ca4486af | patch |
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CVE-2026-86417 (GCVE-0-2026-86417)
Vulnerability from cvelistv5 – Published: 2026-09-07 12:17 – Updated: 2026-09-08 14:50
VLAI
EPSS
VEX
Title
MISP Dashboard Template REST API Exposes Template Owner Email Addresses to Unauthorized Users
Summary
Affected versions of MISP inconsistently enforced email-address visibility in DashboardsController::listTemplates().
The query always fetched User.email, while redaction happened only inside the non-REST rendering branch. As a result, the same authenticated user who saw redacted data in the normal HTML interface could request the REST/JSON representation and receive template owners’ email addresses without the intended privilege check.
The fix moves the decision to a centralized User::canSeeEmails() authorization helper. Email addresses are now fetched only when the requester is a site administrator or the instance explicitly enables Security.disclose_user_emails. The same helper is also reused by other dashboard widgets to keep email-disclosure policy consistent.
Version affected: ≤2.5.45
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 14:50 UTC
CWE
Assigner
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/MISP/MISP/commit/fd554c3bd.patch | patch |
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"description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-862",
"description": "CWE-862 Missing Authorization",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-07T12:17:43.320Z",
"orgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
"shortName": "CIRCL"
},
"references": [
{
"tags": [
"patch"
],
"url": "https://github.com/MISP/MISP/commit/fd554c3bd.patch"
}
],
"source": {
"discovery": "UNKNOWN"
},
"title": "MISP Dashboard Template REST API Exposes Template Owner Email Addresses to Unauthorized Users",
"x_generator": {
"engine": "Vulnogram 0.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "5a6e4751-2f3f-4070-9419-94fb35b644e8",
"assignerShortName": "CIRCL",
"cveId": "CVE-2026-86417",
"datePublished": "2026-09-07T12:17:43.320Z",
"dateReserved": "2026-09-07T12:17:41.496Z",
"dateUpdated": "2026-09-08T14:50:22.615Z",
"state": "PUBLISHED"
},
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}
displaying 1 - 10 vulnerabilities in total 170