BIT-discourse-2026-44787: Discourse: Signup-time primary_group_id assignment grants whisperer access
A vulnerability in Discourse prior to versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 allows newly registered users during signup to assign themselves a primary_group_id. This improper assignment grants them whisper-group privileges without legitimate membership on sites configured with whispers_allowed_groups. The issue has been fixed in the specified patched versions.
AI Analysis
Technical Summary
Discourse versions before 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 contain a vulnerability in the signup flow where users can set the primary_group_id attribute. This flaw enables unauthorized users to gain whisperer access privileges on platforms that use the whispers_allowed_groups configuration, bypassing intended group membership restrictions. The vulnerability is resolved in the listed fixed versions.
Potential Impact
Unauthorized users can gain whisper-group privileges without proper group membership, potentially allowing them to access or participate in private or restricted whisper communications within Discourse forums configured with whispers_allowed_groups. This elevates user privileges beyond intended limits.
Mitigation Recommendations
Upgrade Discourse to versions 2026.6.0, 2026.5.1, 2026.4.2, or 2026.1.5 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
BIT-discourse-2026-44787: Discourse: Signup-time primary_group_id assignment grants whisperer access
Description
A vulnerability in Discourse prior to versions 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 allows newly registered users during signup to assign themselves a primary_group_id. This improper assignment grants them whisper-group privileges without legitimate membership on sites configured with whispers_allowed_groups. The issue has been fixed in the specified patched versions.
Affected software
pkg:bitnami/discourseRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Discourse versions before 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5 contain a vulnerability in the signup flow where users can set the primary_group_id attribute. This flaw enables unauthorized users to gain whisperer access privileges on platforms that use the whispers_allowed_groups configuration, bypassing intended group membership restrictions. The vulnerability is resolved in the listed fixed versions.
Potential Impact
Unauthorized users can gain whisper-group privileges without proper group membership, potentially allowing them to access or participate in private or restricted whisper communications within Discourse forums configured with whispers_allowed_groups. This elevates user privileges beyond intended limits.
Mitigation Recommendations
Upgrade Discourse to versions 2026.6.0, 2026.5.1, 2026.4.2, or 2026.1.5 or later, where this vulnerability is fixed. No other mitigations are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- BIT-discourse-2026-44787
- Osv Schema Version
- 1.6.2
- Aliases
- ["CVE-2026-44787"]
- Ecosystems
- ["Bitnami"]
- Database Specific Severity
- High
- Cvss Version
- null
Threat ID: 6a58b51b68715ace43db4782
Added to database: 07/16/2026, 10:40:27 UTC
Last enriched: 07/16/2026, 14:30:33 UTC
Last updated: 07/16/2026, 21:31:05 UTC
Views: 13
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