CVE-2026-44787 (GCVE-0-2026-44787)
Vulnerability from cvelistv5 – Published: 2026-07-09 22:03 – Updated: 2026-07-10 20:59
VLAI
EPSS
VEX
Title
Discourse: Signup-time primary_group_id assignment grants whisperer access
Summary
Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the signup flow could allow newly registered users to set primary_group_id and gain whisper-group privileges without legitimate group membership on sites with whispers_allowed_groups configured. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.
Severity
8.2 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-10 20:53 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
9 references
| URL | Tags |
|---|---|
| https://github.com/discourse/discourse/security/a… | x_refsource_CONFIRM |
| https://github.com/discourse/discourse/commit/012… | x_refsource_MISC |
| https://github.com/discourse/discourse/commit/0f5… | x_refsource_MISC |
| https://github.com/discourse/discourse/commit/541… | x_refsource_MISC |
| https://github.com/discourse/discourse/commit/6fc… | x_refsource_MISC |
| https://github.com/discourse/discourse/releases/t… | x_refsource_MISC |
| https://github.com/discourse/discourse/releases/t… | x_refsource_MISC |
| https://github.com/discourse/discourse/releases/t… | x_refsource_MISC |
| https://github.com/discourse/discourse/releases/t… | x_refsource_MISC |
Impacted products
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44787",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-10T20:53:15.561918Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-10T20:59:36.502Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "discourse",
"vendor": "discourse",
"versions": [
{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.5"
},
{
"status": "affected",
"version": "\u003e= 2026.4.0-latest, \u003c 2026.4.2"
},
{
"status": "affected",
"version": "\u003e= 2026.5.0-latest, \u003c 2026.5.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the signup flow could allow newly registered users to set primary_group_id and gain whisper-group privileges without legitimate group membership on sites with whispers_allowed_groups configured. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-269",
"description": "CWE-269: Improper Privilege Management",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-09T22:03:41.409Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/discourse/discourse/security/advisories/GHSA-vmwq-jvxx-jwfx",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-vmwq-jvxx-jwfx"
},
{
"name": "https://github.com/discourse/discourse/commit/012796ac28c85b30aa233c5ef042fc66efff8126",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/012796ac28c85b30aa233c5ef042fc66efff8126"
},
{
"name": "https://github.com/discourse/discourse/commit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd16912d8",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd16912d8"
},
{
"name": "https://github.com/discourse/discourse/commit/5418e3027dba109e27a4796463686d61e190ac29",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/5418e3027dba109e27a4796463686d61e190ac29"
},
{
"name": "https://github.com/discourse/discourse/commit/6fc7e6cf04422fc3f9d1c99134803071e983ff0a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/6fc7e6cf04422fc3f9d1c99134803071e983ff0a"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.1.5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.1.5"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.4.2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.4.2"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.5.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.5.1"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.6.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.6.0"
}
],
"source": {
"advisory": "GHSA-vmwq-jvxx-jwfx",
"discovery": "UNKNOWN"
},
"title": "Discourse: Signup-time primary_group_id assignment grants whisperer access"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44787",
"datePublished": "2026-07-09T22:03:41.409Z",
"dateReserved": "2026-05-07T19:20:44.691Z",
"dateUpdated": "2026-07-10T20:59:36.502Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-44787",
"date": "2026-09-22",
"epss": "0.00461",
"percentile": "0.39226"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"product": "discourse",
"vendor": "discourse",
"versions": [
{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.5"
},
{
"status": "affected",
"version": "\u003e= 2026.4.0-latest, \u003c 2026.4.2"
},
{
"status": "affected",
"version": "\u003e= 2026.5.0-latest, \u003c 2026.5.1"
}
]
}
],
"source": "security-advisories@github.com"
}
],
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E41661D7-5D61-44CF-BFEA-57C53057A46F",
"versionEndExcluding": "2026.1.5",
"versionStartIncluding": "2026.1.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"matchCriteriaId": "E594AEEC-13D5-48EE-AE07-0C3C25FBBC72",
"versionEndExcluding": "2026.4.2",
"versionStartIncluding": "2026.4.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CD722A52-B00A-4548-92CA-807CEB0449B0",
"versionEndExcluding": "2026.5.1",
"versionStartIncluding": "2026.5.0",
"vulnerable": true
},
{
"criteria": "cpe:2.3:a:discourse:discourse:2026.6.0:*:*:*:latest:*:*:*",
"matchCriteriaId": "F2E7E180-2D99-484E-80A8-12F706ABDE65",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the signup flow could allow newly registered users to set primary_group_id and gain whisper-group privileges without legitimate group membership on sites with whispers_allowed_groups configured. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5."
}
],
"id": "CVE-2026-44787",
"lastModified": "2026-07-14T20:44:55.057",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 3.9,
"impactScore": 4.2,
"source": "security-advisories@github.com",
"type": "Secondary"
},
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.1,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
},
"exploitabilityScore": 2.8,
"impactScore": 4.2,
"source": "nvd@nist.gov",
"type": "Primary"
}
],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
"id": "CVE-2026-44787",
"options": [
{
"exploitation": "none"
},
{
"automatable": "yes"
},
{
"technicalImpact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-10T20:53:15.561918Z",
"version": "2.0.3"
}
}
]
},
"published": "2026-07-09T22:17:04.607",
"references": [
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
],
"url": "https://github.com/discourse/discourse/commit/012796ac28c85b30aa233c5ef042fc66efff8126"
},
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
],
"url": "https://github.com/discourse/discourse/commit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd16912d8"
},
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
],
"url": "https://github.com/discourse/discourse/commit/5418e3027dba109e27a4796463686d61e190ac29"
},
{
"source": "security-advisories@github.com",
"tags": [
"Patch"
],
"url": "https://github.com/discourse/discourse/commit/6fc7e6cf04422fc3f9d1c99134803071e983ff0a"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.1.5"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.4.2"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.5.1"
},
{
"source": "security-advisories@github.com",
"tags": [
"Release Notes"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.6.0"
},
{
"source": "security-advisories@github.com",
"tags": [
"Vendor Advisory",
"Mitigation"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-vmwq-jvxx-jwfx"
}
],
"sourceIdentifier": "security-advisories@github.com",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-269"
}
],
"source": "security-advisories@github.com",
"type": "Secondary"
}
]
}
},
"vulnrichment": {
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-44787",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-07-10T20:53:15.561918Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-07-10T20:53:16.411Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "discourse",
"vendor": "discourse",
"versions": [
{
"status": "affected",
"version": "\u003e= 2026.1.0-latest, \u003c 2026.1.5"
},
{
"status": "affected",
"version": "\u003e= 2026.4.0-latest, \u003c 2026.4.2"
},
{
"status": "affected",
"version": "\u003e= 2026.5.0-latest, \u003c 2026.5.1"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, the signup flow could allow newly registered users to set primary_group_id and gain whisper-group privileges without legitimate group membership on sites with whispers_allowed_groups configured. This issue is fixed in versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-269",
"description": "CWE-269: Improper Privilege Management",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-07-09T22:03:41.409Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/discourse/discourse/security/advisories/GHSA-vmwq-jvxx-jwfx",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/discourse/discourse/security/advisories/GHSA-vmwq-jvxx-jwfx"
},
{
"name": "https://github.com/discourse/discourse/commit/012796ac28c85b30aa233c5ef042fc66efff8126",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/012796ac28c85b30aa233c5ef042fc66efff8126"
},
{
"name": "https://github.com/discourse/discourse/commit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd16912d8",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd16912d8"
},
{
"name": "https://github.com/discourse/discourse/commit/5418e3027dba109e27a4796463686d61e190ac29",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/5418e3027dba109e27a4796463686d61e190ac29"
},
{
"name": "https://github.com/discourse/discourse/commit/6fc7e6cf04422fc3f9d1c99134803071e983ff0a",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/commit/6fc7e6cf04422fc3f9d1c99134803071e983ff0a"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.1.5",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.1.5"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.4.2",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.4.2"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.5.1",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.5.1"
},
{
"name": "https://github.com/discourse/discourse/releases/tag/v2026.6.0",
"tags": [
"x_refsource_MISC"
],
"url": "https://github.com/discourse/discourse/releases/tag/v2026.6.0"
}
],
"source": {
"advisory": "GHSA-vmwq-jvxx-jwfx",
"discovery": "UNKNOWN"
},
"title": "Discourse: Signup-time primary_group_id assignment grants whisperer access"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2026-44787",
"datePublished": "2026-07-09T22:03:41.409Z",
"dateReserved": "2026-05-07T19:20:44.691Z",
"dateUpdated": "2026-07-10T20:59:36.502Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Loading…
Loading…
The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Loading…
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
Loading…