Summary
Weblate has IDOR in GroupViewSet that allows authenticated project manager to gain unauthorized read access to any private project
Advisory details
Impact
The API did not properly handle project- and workspace-scoped teams and allowed setting invalid configurations, including granting access to projects the user has no access to.
Patches
References
Parts of this issue were independently reported by four reporters:
References
- https://github.com/advisories/GHSA-2q2q-jr9g-v9rf
- https://github.com/WeblateOrg/weblate/security/advisories/GHSA-2q2q-jr9g-v9rf
- https://nvd.nist.gov/vuln/detail/CVE-2026-55228
- https://github.com/WeblateOrg/weblate/pull/19970
- https://github.com/WeblateOrg/weblate/commit/19babc99b05f2cc299b5090f90f79d8181f25d79
Related vulnerabilities
All Supply chain →- MEDIUMCVE-2026-107850
Contao: Improper access control in the preview links module
- MEDIUMCVE-2026-91980
Vikunja: Any user can enumerate every team and its members by attaching arbitrary teams to a throwaway project
- MEDIUMCVE-2026-91984
Vikunja: Cross-tenant task-position rows can be injected into arbitrary project views via the unvalidated project_view_id in the task position endpoint (v1 and v2)
- HIGHCVE-2026-91985
Vikunja: Read-only project members can obtain any link share's access hash via the single-share read endpoint (v1 and v2) and escalate to the share's permission level
- HIGHCVE-2026-76216
Vikunja: Link-share principal-type confusion enables cross-account team removal, bot takeover, and roster disclosure
- CRITICALCVE-2026-68582
Vikunja: Link-share token reads any tenant's kanban buckets and enumerates usernames/IDs instance-wide (BOLA)