Gogs: Overwriting critical files results in a denial of service

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

8.5 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:H

EPSS

• CVE-2026-52797: 0.53% estimated exploitation activity in the next 30 days; percentile 44.86 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

Vulnerability type: Path Traversal Impact: DoS Exploitation prerequisite: authorized user Description: As an authorized user, an intruder can dictate the value which is passed to the git diff command which, together with bypassing the filtering of the passed value, allows the user to bypass the target directory and write the result of the comparison to any arbitrary path. Researcher: Artyom Kulakov (Positive Technologies) Mitigation: 1. https://github.com/gogs/gogs/blob/b7372b1f32cd0bb40984debfb049e3fc04efaee4/internal/route/repo/editor.go#L307 — on this line, instead of the treePath variable, which comes directly from the user unchanged, we should first filter and then pass the entry variable. 2. To filter the treePath variable, it is better to use the preexisting pathutil.Clean function instead of path.Clean from the standard Go library. Exploitation A Positive Technologies researcher discovered that the user has the ability to preview their changes when editing a file in the…

Published by the source

16 Jun 2026, 23:40 UTC

Last modified by the source

21 Jul 2026, 13:17 UTC

Source last checked

26 Oct 2026, 15:27 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-pm6v-2h4w-4rp2

Preview the exact text before you copy it. Commands are read-only suggestions; review them before running anything.

# Patch Next advisory brief: CVE-2026-52797

Advisory: Gogs: Overwriting critical files results in a denial of service
IDs: CVE-2026-52797, GHSA-pm6v-2h4w-4rp2
Record: https://patchnext.com/advisories/cve-2026-52797 (revision 1, source checked 26 Oct 2026, 15:27 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: High (CVSS 8.5)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: gogs.io/gogs 0.14.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go gogs.io/gogs: affected <= 0.13.4; fixed in 0.14.0

## Suggested inspection (read-only)
- Go gogs.io/gogs: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on gogs.io/gogs.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-pm6v-2h4w-4rp2 (GitHub-reviewed advisory GHSA-pm6v-2h4w-4rp2 lists affected ranges: Go gogs.io/gogs >=0 <=0.13.4)

Commands are suggestions: review each one before running it.