CVE-2026-116825

The YesWiki software (versions 4.6.2 before 4.7.0 ) is vulnerable to an HTTP Signature Replay attack via the ActivityPub Inbox. The root cause is located in HttpSignatureService::verifySignature(), which fails to validate the Date header or track previously seen signatures. An attacker who captur...

CVE-2026-104463 YesWiki before 4.6.7 Unauthenticated SSRF via ActivityPub Inbox

YesWiki before 4.6.7 contains a server-side request forgery vulnerability that allows unauthenticated attackers to trigger server requests by sending signed Follow activities to the public forms actor inbox route. Attackers sign requests with their own keyId while supplying internal actor URLs in...

CVE-2026-104463 YesWiki before 4.6.7 Unauthenticated SSRF via ActivityPub Inbox

YesWiki before 4.6.7 contains a server-side request forgery vulnerability that allows unauthenticated attackers to trigger server requests by sending signed Follow activities to the public forms actor inbox route. Attackers sign requests with their own keyId while supplying internal actor URLs in...

CVE-2026-104445: Authentication Bypass by 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. Unauthenticated attackers with any ActivityPub keypair can send signed Delete or Update activities referencing a mirrored...

Hollo security vulnerabilities

Hollo is a micro-blogging software developed by Fedify. Versions of Hollo prior to 0.6.20 and 0.7.2 contained security vulnerabilities. These vulnerabilities were due to the exposure of private messages and posts visible only to followers through the ActivityPub inbox endpoint, which could lead t...

Nexkey Input Validation Error Vulnerability

Nexkey is an open source, decentralized social media platform for nexryai individual developers. An input validation error vulnerability exists in versions of Nexkey prior to 12.122.2, which stems from insufficient validation of ActivityPub requests received in the inbox, and could allow any user...