CVE-2026-52804 PUBLISHED

Gogs: Privilege Escalation via Collaboration Access Mode Validation

Assigner: GitHub_M
Reserved: 08.06.2026 Published: 24.06.2026 Updated: 24.06.2026

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.

Metrics

CVSS 4.0

CVSS Vector: 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
CVSS Score: 5.5

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	None	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	High
User Interaction	None

CVSS 4.0

Product Status

Vendor	gogs
Product	gogs
Versions	Version < 0.14.3 is affected

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

Problem Types

CWE-193: Off-by-one Error CWE