Discourse: Signup-time primary_group_id assignment grants whisperer access

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Summary

CVECVE-2026-44787
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-09 22:17:04 UTC
Updated2026-07-14 20:44:55 UTC
DescriptionDiscourse 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

EPSS: 0.003090000 probability, percentile 0.227770000 (date 2026-07-13)

Problem Types: CWE-269 | CWE-269 CWE-269: Improper Privilege Management

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
3.1[email protected]Secondary8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
3.1CNADECLARED8.2HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Discourse Discourse All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Discourse Discourse affected >= 2026.1.0-latest, < 2026.1.5 Not specified
CNA Discourse Discourse affected >= 2026.4.0-latest, < 2026.4.2 Not specified
CNA Discourse Discourse affected >= 2026.5.0-latest, < 2026.5.1 Not specified

References

ReferenceSourceLinkTags
github.com/discourse/discourse/releases/tag/v2026.5.1 [email protected] github.com Release Notes
github.com/discourse/discourse/security/advisories/GHSA-vmwq-jvxx-jwfx [email protected] github.com Vendor Advisory, Mitigation
github.com/discourse/discourse/commit/6fc7e6cf04422fc3f9d1c99134803071e9... [email protected] github.com Patch
github.com/discourse/discourse/commit/0f50a07a6ef4b33f3f826ce6d7bf6d7bd1... [email protected] github.com Patch
github.com/discourse/discourse/releases/tag/v2026.6.0 [email protected] github.com Release Notes
github.com/discourse/discourse/releases/tag/v2026.1.5 [email protected] github.com Release Notes
github.com/discourse/discourse/commit/012796ac28c85b30aa233c5ef042fc66ef... [email protected] github.com Patch
github.com/discourse/discourse/releases/tag/v2026.4.2 [email protected] github.com Release Notes
github.com/discourse/discourse/commit/5418e3027dba109e27a4796463686d61e1... [email protected] github.com Patch
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