Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck
CVE-2026-116825YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox
Medium 6.5
In plain English
A medium-severity security flaw in yeswiki from YesWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 13% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.2%top 86.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-294 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L
References
- GitHub Security Advisory (GHSA-7m9j-h553-397x) vendor-advisory
- VulnCheck Advisory: YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox third-party-advisory