CVE-2026-104446CWE-306

CVE-2026-104446

Medium · published October 2, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
36.8
In the wild
Unconfirmed
What it is

YesWiki before 4.6.7 contains an authentication bypass in the contact mail AJAX handler that allows unauthenticated attackers to send email through the wiki's SMTP server. Attackers can POST an XMLHttpRequest to the mail handler without field or type parameters, supplying arbitrary recipient, sender, subject and body for spam and phishing.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
CVSS v4.0
6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
EPSS
0.00435 · 36.8th percentile
Weakness
CWE-306 · Missing Authentication for Critical Function
Published
2026-10-02T16:17Z
References (3)
https://github.com/YesWiki/yeswiki/security/advisories/GHSA-36fx-49jj-57rw · [email protected]https://www.vulncheck.com/advisories/yeswiki-before-4.6.7-unauthenticated-open-mail-relay-via-contact-mail-handler · [email protected]https://github.com/YesWiki/yeswiki/security/advisories/GHSA-36fx-49jj-57rw · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 04 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 02 OCT 11:38Z
    YesWiki before 4.6.7 Unauthenticated Open Mail Relay via Contact Mail Handler
    cvelistv5