Auth bypass in Yeswiki
CVE-2026-104449
YesWiki before 4.6.7 contains an access control vulnerability allowing unauthenticated attackers to overwrite any existing wiki page, including pages whose write ACL restricts editing, via the Bazar entry-creation flow. Attackers can submit a crafted entry with an attacker-controlled id_fiche matching an existing page, overwriting its body for mass defacement and content destruction.
Vulnerability class: IDOR (Insecure Direct Object Reference)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:L.
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
Weakness classification (CWE)
References
- github.com/YesWiki/yeswiki/security/advisories/GHSA-4388-phmh-jrw8 (vendor-advisory)
- www.vulncheck.com/advisories/yeswiki-before-4.6.7-unauthenticated-page-overwrit… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-104449?
- CVE-2026-104449 is a medium-severity vulnerability in Yeswiki, classified under Authorization Bypass Through User-Controlled Key. CVSS score: 6.5/10. Published 2026-10-02.
- How severe is CVE-2026-104449?
- Medium severity. CVSS v3 base score is 6.5 out of 10.