HIGH 8.7 NVD
CVE-2026-104976
Plane is an open-source project management tool. Prior to 1.4.0, Plane validates GITEA_HOST only for its URL scheme and does not reject hosts that resolve to pr
Plane is an open-source project management tool. Prior to 1.4.0, Plane validates GITEA_HOST only for its URL scheme and does not reject hosts that resolve to private or internal IP addresses. The four outbound requests in the Gitea OAuth flow are derived from this unvalidated host and do not call validate_url(). In addition, avatar_url is taken from the Gitea user's profile, where users can configure external avatar URLs. After an administrator enables Gitea OAuth for a legitimate instance, a Gitea user can set an internal URL as the profile avatar and log in through Gitea, causing Plane to fetch the internal target without validation. This issue is fixed in 1.4.0.
References
- https://github.com/makeplane/plane/commit/04622ce1188c4680951f0001e35efb342fe51615
- https://github.com/makeplane/plane/pull/9163
- https://github.com/makeplane/plane/releases/tag/v1.4.0
- https://github.com/makeplane/plane/security/advisories/GHSA-hx79-5pj5-qh42
This high severity vulnerability with a CVSS score of 8.7 was published on 2026-10-05 via NVD.
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