CVE-2026-116208

High

Description

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.

SeverityHigh

CVSS8.1

Exploit probability—

Product

Yeswiki

PublishedOct 25, 2026

First seenOct 25, 2026

Weakness typeCWE-862Missing authorization

How to fix

Update

YesWiki yeswiki4.7.0 or later

Vendor advisories

github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2j

Affected products

Product	Affected versions	Fixed in
YesWiki yeswiki	4.6.2 ≤ v < 4.7.0	4.7.0

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