What is CVE-2026-104465?

CVE-2026-104465 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-02.

How severe is CVE-2026-104465?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Yeswiki

CVE-2026-104465

YesWiki before 4.6.7 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject scripts via the field parameter of the mail handler. Attackers can craft links whose field value breaks out of the ajax-mail-form action attribute to execute JavaScript in victims' browsers.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-10-02 · last modified 2026-10-02.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Yeswiki

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-2fc6-rvp3-fgfj (vendor-advisory)
www.vulncheck.com/advisories/yeswiki-before-4.6.7-reflected-xss-via-field-param… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104465?: CVE-2026-104465 is a medium-severity vulnerability in Yeswiki, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-10-02.
How severe is CVE-2026-104465?: Medium severity. CVSS v3 base score is 6.1 out of 10.