Vulnerability Description
YesWiki before 4.7.0 contains a read-ACL bypass in AclService::updateRequestWithACL, which interpolates usernames into SQL LIKE patterns without escaping the _ and % wildcards. Self-registered attackers can use usernames such as ___ or %%% that over-match ACL tokens, reading pages and Bazar entries restricted to other users or groups via the public Bazar listing API.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/YesWiki/yeswiki/commit/f3b0dd093a7ace47dc29a515faeb02635bacea
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94
- https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-read-acl-bypass-via-sq
FAQ
What is CVE-2026-116821?
CVE-2026-116821 is a vulnerability with a CVSS score of 6.5 (MEDIUM). YesWiki before 4.7.0 contains a read-ACL bypass in AclService::updateRequestWithACL, which interpolates usernames into SQL LIKE patterns without escaping the _ and % wildcards. Self-registered attacke...
How severe is CVE-2026-116821?
CVE-2026-116821 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116821?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.