CVE-2026-52804

Gogs: Privilege Escalation via Collaboration Access Mode Validation

State: Published
Severity: 5.5 Medium
Published: Jun 24, 2026
Updated: Jun 26, 2026
Reserved: Jun 8, 2026

Description

Gogs is an open source self-hosted Git service. Prior to 0.14.3, a repository admin collaborator can escalate their privileges to owner-level access by exploiting an off-by-one error in the ChangeCollaborationAccessMode function. This vulnerability is fixed in 0.14.3.

Scores

CVSS	Score	Vector	Source
4.0	5.5 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:P	GitHub_M

Weaknesses

CWE-193 Off-by-one Error

Affected Products

Product	Versions
gogsgogs	< 0.14.3Affected

References

https://github.com/gogs/gogs/security/advisories/GHSA-4565-r4x7-hg8j
https://github.com/gogs/gogs/pull/8227
https://github.com/gogs/gogs/commit/1fdc9cc28e159135cfa4d6b11ecd5daa0f8ce22b
https://github.com/gogs/gogs/releases/tag/v0.14.3

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