CVE-2026-23603 Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim

Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim...

CVE-2026-23603

CVE-2026-23603 affects Gitea in the OAuth2 avatar synchronization flow, due to unvalidated OIDC picture claim enabling blind SSRF. Documented for Gitea with a published advisory (GHSA) and linked to Gitea release 1.27.0. Exploitation details are not provided in the sources; the CVSS score is Low ...

CVE-2026-23603 Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim

Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim...

GO-2026-6083 Gitea: Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim in gitea.dev

Gitea: Blind SSRF in OAuth2 avatar synchronization via unvalidated OIDC picture claim in gitea.dev...

Server-side Request Forgery (SSRF)

Overview Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the oauth2UpdateAvatarIfNeed function. An attacker can cause the server to make arbitrary outbound HTTP GET requests by supplying a crafted avatar URL through the OAuth2/OIDC picture claim. This can...