High severity8.1NVD Advisory· Published Oct 25, 2026· Updated Oct 25, 2026

CVE-2026-116208

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.

Affected products

Yeswiki/Yeswikillm-fuzzy
Range: <4.7.0, >=4.6.2

Patches

Vulnerability mechanics

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-cr64-h6xp-9g2jnvd
www.vulncheck.com/advisories/yeswiki-4.6.2-before-4.7.0-missing-authorization-in-activitypub-syncactorpostsnvd

News mentions

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