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mirror of https://github.com/go-gitea/gitea.git synced 2026-06-01 14:56:00 +02:00
gitea/services
Lunny Xiao 4e5f43896e
fix(auth): ignore stale OIDC external login links to organizations (#37875)
## Summary

This fixes an OIDC sign-in edge case where a stale `external_login_user`
record can still point to an organization or a deleted user.

In that situation, Gitea may keep resolving the external login to the
wrong account during sign-in. For affected instances, this matches the
behavior reported in #36439 and #37812, where a user signing in with
OIDC/Entra ID could appear as an organization, or hit a 404 after that
organization was removed.

## What changed

- validate the user resolved from `external_login_user` during
OAuth2/OIDC login
- ignore stale links when the linked user no longer exists
- ignore stale links when the linked user is not an individual user
- remove the stale external login row so the sign-in flow can relink the
external account to the correct user

## Related

- Fixes #37812
- Related to #36439

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Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: Claude (Opus 4.8) <noreply@anthropic.com>
2026-05-30 20:37:09 +00:00
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