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Critical, CVSS 9.1amended

Gitea OAuth2 authorization codes can be reused after expiry

CVE-2026-26232GHSA-5v69-g2m3-3hq3

What to do

Vendor fix available. Upgrade each affected package to the fixed version on its release line (code.gitea.io/gitea 1.25.5), redeploy, then verify what is actually installed.

This page has no inventory attached, so it cannot say whether you are affected. A vendor fix is not proof that your deployment is fixed.

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Affected packages

Sources

Severity and exploitation
Exploitation
No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.
CVSS
9.1 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS
  • CVE-2026-26232: 0.50% estimated exploitation activity in the next 30 days; percentile 42.54 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.
Source description

As published by the source; long descriptions are shortened.

Gitea versions before 1.25.5 do not consistently enforce OAuth2 authorization code expiry and single-use behavior during token exchange.

Dates and revisions
Published by the source
Last modified by the source
Source last checked
  1. Revision 2 · amended ·

    Amended from ghsa record GHSA-5v69-g2m3-3hq3

  2. Revision 1 · created ·

    Published from osv record GO-2026-6336

Agent brief

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# Patch Next advisory brief: CVE-2026-26232

Advisory: Gitea OAuth2 authorization codes can be reused after expiry
IDs: CVE-2026-26232, GHSA-5v69-g2m3-3hq3
Record: https://patchnext.com/advisories/cve-2026-26232 (revision 2, source checked 26 Oct 2026, 15:28 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: code.gitea.io/gitea 1.25.5. A vendor fix does not mean a deployment is fixed.

## Affected components
- Go code.gitea.io/gitea: affected < 1.25.5; fixed in 1.25.5

## Suggested inspection (read-only)
- Go code.gitea.io/gitea: 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 code.gitea.io/gitea.
- 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://osv.dev/vulnerability/GO-2026-6336 (OSV record GO-2026-6336 lists affected ranges: Go code.gitea.io/gitea >=0 <1.25.5 (fixed))
- Verified: https://github.com/advisories/GHSA-5v69-g2m3-3hq3 (GitHub-reviewed advisory GHSA-5v69-g2m3-3hq3 lists affected ranges: Go code.gitea.io/gitea >=0 <1.25.5)

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