CVE-2026-104459

Description

YesWiki before 4.6.7 contains a server-side request forgery vulnerability in WebfingerService that allows unauthenticated attackers to trigger HTTPS requests to internal hosts. Attackers can POST a crafted actor_handle with a numeric host and port to the abonnements view to probe internal HTTPS services and ports.

CVSS Vector

References

• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-x4mq-qxvc-g82j
• https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-ssrf-via-activitypub-webfinger-actor-handle
• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-x4mq-qxvc-g82j