CVE-2026-121560

LogChimp versions 0.9.0-alpha.1 before 0.9.3 are vulnerable to an authorization bypass via the PATCH /api/v1/posts endpoint. The root cause is the handling of mismatched postId and id body parameters; an authenticated author can set postId to their own post while providing an enumerated victim po...

CVE-2026-121560 LogChimp before 0.9.3 Authorization Bypass via PATCH /api/v1/posts

LogChimp 0.9.0-alpha.1 before 0.9.3 contains an authorization bypass vulnerability that allows authenticated post authors to modify any other post by supplying mismatched postId and id body parameters. Attackers can set postId to their own post and id to an enumerated victim post UUID to overwrit...