Auth bypass in Gogs
CVE-2026-25242
Gogs is an open source self-hosted Git service. Versions 0.13.4 and below expose unauthenticated file upload endpoints by default. When the global RequireSigninView setting is disabled (default), any remote user can upload arbitrary files to the server via /releases/attachments and /issues/attachments. This enables the instance to be abused as a public file host, potentially leading to disk exhaustion, content hosting, or delivery of malware. CSRF tokens do not mitigate this attack due to same-origin cookie issuance. This issue has been fixed in version 0.14.1.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.006 (48.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 48th percentile — 48.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: +0.000
Affected products
- Gogs — versions < 0.14.1
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/gogs/gogs/security/advisories/GHSA-fc3h-92p8-h36f (Exploit, Patch, Vendor Advisory)
- github.com/gogs/gogs/pull/8128 (Issue Tracking)
- github.com/gogs/gogs/commit/628216d5889fcb838c471f4754f09b935d9cd9f3 (Patch)
- github.com/gogs/gogs/releases/tag/v0.14.1 (Release Notes)
Frequently asked questions
- What is CVE-2026-25242?
- CVE-2026-25242 is a critical-severity vulnerability in Gogs, classified under Missing Authorization. CVSS score: 9.8/10. Published 2026-02-19.
- How severe is CVE-2026-25242?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2026-25242 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.