CVE-2026-104445CWE-290

CVE-2026-104445

High · published October 2, 2026

CVSS v3.1
8.2
EPSS
0%
Percentile
32.8
In the wild
Unconfirmed
What it is

YesWiki before 4.6.7 contains an authentication bypass vulnerability in the ActivityPub inbox that fails to bind the verified HTTP signature signer to the activity actor. Unauthenticated attackers with any ActivityPub keypair can send signed Delete or Update activities referencing a mirrored entry's sourceUrl to delete or overwrite other actors' federated entries.

The record
Technical detail
CVSS v3.1
8.2 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
CVSS v4.0
8.8 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N
EPSS
0.00397 · 32.8th percentile
Weakness
CWE-290 · Authentication Bypass by Spoofing
Published
2026-10-02T16:17Z
References (2)
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-rm6r-grfg-4v78 · [email protected]https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-authentication-bypass-via-activitypub-inbox-actor-spoofing · [email protected]
EPSS history
Timeline
  • 04 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 02 OCT 11:38Z
    YesWiki before 4.6.7 Authentication Bypass via ActivityPub Inbox Actor Spoofing
    cvelistv5