CVE-2026-116825

YesWiki from 4.6.2 before 4.7.0 lacks replay protection in HttpSignatureService::verifySignature(), which never validates the Date header or tracks seen signatures. Attackers who capture a signed request to the /api/forms/{formId}/actor/inbox endpoint can replay it later to re-execute Delete, Update, Follow, or Undo actions.

Score

CVSS 4.0 8.3 High

Status

Deferred - disclosure@vulncheck.com

Published

2026-10-26

Last modified

2026-10-27

Weaknesses

CWE-294

Affected products

• Yeswiki (Yeswiki)

References

• https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7m9j-h553-397x
• https://www.vulncheck.com/advisories/yeswiki-from-4.6.2-before-4.7.0-http-signature-replay-via-activitypub-inbox