What is CVE-2026-104455?

CVE-2026-104455 is a medium-severity vulnerability in Yeswiki, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-10-02.

How severe is CVE-2026-104455?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Information disclosure in Yeswiki

CVE-2026-104455

YesWiki before 4.6.7 contains an access control bypass vulnerability that allows unauthenticated attackers to read restricted page content via the recentchangesrssplus RSS action. Attackers can request the xml method of a page hosting the action to retrieve 500-character body excerpts of every latest page, including read-restricted drafts and notes.

Vulnerability class: Information Disclosure

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/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-200 — Information Disclosure

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-89vc-h4r4-h25q (vendor-advisory)
www.vulncheck.com/advisories/yeswiki-before-4.6.7-read-acl-bypass-via-recentcha… (third-party-advisory)

Frequently asked questions

What is CVE-2026-104455?: CVE-2026-104455 is a medium-severity vulnerability in Yeswiki, classified under Information Disclosure. CVSS score: 5.3/10. Published 2026-10-02.
How severe is CVE-2026-104455?: Medium severity. CVSS v3 base score is 5.3 out of 10.