CVE-2026-116208 YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts

High 7.2 Published 25 Oct 2026 Updated 25 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-116208?

CVE-2026-116208 is a high-severity vulnerability in yeswiki, published on 25 Oct 2026.

Official 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.

Weakness: CWE-862

Which versions are affected by CVE-2026-116208?

How do I fix CVE-2026-116208?

No fix has been published for CVE-2026-116208 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-116208 being exploited?

There is no known exploitation of CVE-2026-116208 in the wild and no public exploit code.

Sources

Also known as GHSA-cr64-h6xp-9g2j, GHSA-wpv5-x9h8-8qxg.