CVE-2026-104445 — YesWiki before 4.6.7 Authentication Bypass via ActivityPub Inbox Actor Spoofing
YesWiki before 4.6.7 contains an authentication bypass vulnerability in the ActivityPub inbox that fails to bind the verified HTTP signature signer to the activity actor. Unauth…
Published: 2026-10-02 · CVSS: 8.8 · CVSS 4.0
YesWiki before 4.6.7 contains an authentication bypass vulnerability in the ActivityPub inbox that fails to bind the verified HTTP signature signer to the activity actor. Unauthenticated attackers with any ActivityPub keypair can send signed Delete or Update activities referencing a mirrored entry's sourceUrl to delete or overwrite other actors' federated entries.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7