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Advisory record · GHSA-cj4v-437j-jq4c

Gogs: Cross-repository LFS object overwrite via missing content hash verification

CVSS 9.3 CriticalCriticalEPSS 0.0037 · 31st percentile

Critical, because:

  • CVSS score 9.3: 9.0 or more.

How we decide what’s critical

Published by the GitHub Advisory Database at 5 Mar 2026, 19:14 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
gogs.io/gogsGo<0.14.20.14.2
Identifiers
GHSA-cj4v-437j-jq4c · CVE-2026-25921 · GO-2026-4616
Weakness (CWE)
CWE-345
Tags
Published
5 Mar 2026
Updated
23 Mar 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Gogs versions before 0.14.2 are affected. Gogs stores all LFS objects in one shared location without isolating them by repository and does not check uploaded content against its claimed SHA-256 hash, so an authenticated user can overwrite an LFS object belonging to another repository with malicious content. Upgrade to Gogs 0.14.2 or later. The source gives no workaround.

Written 7 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
9.3 Critical 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:H/A:L CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0037, the 31st percentile, on 10 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 15:09 UTC First seen by agentprime
  2. 31 Oct 2026, 15:09 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.