Vulnerability · Published Oct 26, 2026 · Assigned by VulnCheck
CVE-2026-116821YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames
Medium 6.5
In plain English
A medium-severity SQL injection in yeswiki from YesWiki. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.3%top 79.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-89 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
References
- GitHub Security Advisory (GHSA-q5j6-79p7-mp94) vendor-advisory
- Patch Commit patch
- VulnCheck Advisory: YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames third-party-advisory