---
id: CVE-2026-116208
title: YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts
summary: >-
  YesWiki from 4.6.2 before 4.7.0 contains a missing authorization vulnerability
  in ActivityPubService::syncActorPosts that lets malicious ActivityPub servers
  manipulate other actors' mirrored entries. Attackers can serve a poisoned
  outbox…
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H'
cvssSource: cna
cwe:
  - CWE-862
vendor: YesWiki
product: yeswiki
affected:
  - yeswiki >= 4.6.2 < 4.7.0
published: '2026-10-25'
updated: '2026-10-25'
sourceUpdated: '2026-10-25T13:20:38.152Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-116208'
references:
  - url: 'https://github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j'
    label: GitHub Security Advisory (GHSA-cr64-h6xp-9g2j)
  - url: >-
      https://www.vulncheck.com/advisories/yeswiki-4.6.2-before-4.7.0-missing-authorization-in-activitypub-syncactorposts
    label: >-
      VulnCheck Advisory: YesWiki 4.6.2 before 4.7.0 Missing Authorization in
      ActivityPub syncActorPosts
tags:
  - cve.org
ingestedAt: '2026-10-25T22:08:29.937Z'
epss: 0.00242
epssPercentile: 0.15225
---

## Overview

YesWiki from 4.6.2 before 4.7.0 contains a missing authorization vulnerability in ActivityPubService::syncActorPosts that lets malicious ActivityPub servers manipulate other actors' mirrored entries. Attackers can serve a poisoned outbox with cross-actor Delete, Update, or Create activities during admin-initiated sync to delete, overwrite, forge, or mass-delete entries.

## Affected

- `yeswiki >= 4.6.2 < 4.7.0`

## Remediation

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