What is CVE-2026-25921?

CVE-2026-25921 is a critical-severity vulnerability in Gogs, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.3/10. Published 2026-03-05.

How severe is CVE-2026-25921?

Critical severity. CVSS v3 base score is 9.3 out of 10.

Vulnerability in Gogs

CVE-2026-25921

Gogs is an open source self-hosted Git service. Prior to version 0.14.2, overwritable LFS object across different repos leads to supply-chain attack, all LFS objects are vulnerable to be maliciously overwritten by malicious attackers. This issue has been patched in version 0.14.2.

Published 2026-03-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L.

EPSS exploit prediction

EPSS: 0.003 (17.8th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: -0.001

Affected products

Gogs — versions < 0.14.2

Weakness classification (CWE)

CWE-345 — Insufficient Verification of Data Authenticity

References

github.com/gogs/gogs/security/advisories/GHSA-cj4v-437j-jq4c (Exploit, Mitigation, Vendor Advisory)
github.com/gogs/gogs/pull/8166 (Issue Tracking)
github.com/gogs/gogs/commit/81ee8836445ac888d99da8b652be7d5cbc5c4d5c (Patch)
github.com/gogs/gogs/releases/tag/v0.14.2 (Release Notes)

Frequently asked questions

What is CVE-2026-25921?: CVE-2026-25921 is a critical-severity vulnerability in Gogs, classified under Insufficient Verification of Data Authenticity. CVSS score: 9.3/10. Published 2026-03-05.
How severe is CVE-2026-25921?: Critical severity. CVSS v3 base score is 9.3 out of 10.