CVE-2026-116825

YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox

MEDIUM
6.5
CVSS Score
Published: October 26, 2026 at 11:05 PM UTC
Updated: October 27, 2026 at 12:17 AM UTC
1 product affected across 1 vendorYesWiki

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.2%

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vendor states this is fixed in 4.7.0 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

CVSS

6.5MEDIUMVulnCheck
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
HIGH
Availability
LOW
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-294

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