CVE-2026-116208

YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts

7.2 High

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: Passive

What an attacker can affect

Confidentiality: None
Integrity: High
Availability: High

Exploit likelihood

0.24%Unchanged since Oct 26, 2026

What each source reports

CVE List Score used 7.2

YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts

Record: CVE-2026-116208
CVSS 4.0: 7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Weakness: CWE-862
Updated: 2026-11-03

EUVDEUVD-2026-109466 7.2

Record: EUVD-2026-109466
CVSS 4.0: 7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Updated: 2026-11-03

GitHub AdvisoriesGHSA-wpv5-x9h8-8qxg 7.2

YesWiki from 4.6.2 before 4.7.0 contains a missing authorization vulnerability in...

Record: GHSA-wpv5-x9h8-8qxg
CVSS 4.0: 7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Weakness: CWE-862
Updated: 2026-11-02

NVD 7.2

Record: CVE-2026-116208
CVSS 4.0: 7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1: 8.1 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Weakness: CWE-862
Updated: 2026-11-03

OSV 7.2

YesWiki 4.6.2 before 4.7.0 Missing Authorization in ActivityPub syncActorPosts

Record: CVE-2026-116208
CVSS 4.0: 7.2 HighCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness: CWE-862
Updated: 2026-11-07

Affected products

yeswiki

History

History
Recorded	Changed	Sources
Nov 3, 2026	facts, references	CVE List
Nov 2, 2026	first indexed	CVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-116208 is a high vulnerability (CVSS 7.2) in Yeswiki, published October 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.24%, the 15th percentile. No source names a fixed version.