{"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,"slug":"CVE-2026-116208","body":"## Overview\n\nYesWiki 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.\n\n## Affected\n\n- `yeswiki >= 4.6.2 < 4.7.0`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":45,"depthScoreParts":{"impact":44.6,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}