---
id: CVE-2026-116825
title: YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay via ActivityPub Inbox
summary: >-
  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/…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L'
cvssSource: cna
cwe:
  - CWE-294
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki >= 4.6.2 < 4.7.0
ssvc:
  exploitation: poc
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-02T18:47:42.687170Z'
exploitAvailable: true
published: '2026-10-26'
updated: '2026-11-02'
sourceUpdated: '2026-11-02T18:47:58.288Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116825'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-7m9j-h553-397x'
    label: GitHub Security Advisory (GHSA-7m9j-h553-397x)
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-from-4.6.2-before-4.7.0-http-signature-replay-via-activitypub-inbox
    label: >-
      VulnCheck Advisory: YesWiki from 4.6.2 before 4.7.0 HTTP Signature Replay
      via ActivityPub Inbox
tags:
  - cve.org
  - exploit-available
epss: 0.00225
epssPercentile: 0.1332
ingestedAt: '2026-10-27T16:11:59.148Z'
---

## Overview

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

- `yeswiki >= 4.6.2 < 4.7.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.