CVE-2026-116821 Details
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.
A read-ACL bypass vulnerability has been identified in YesWiki versions prior to 4.7.0. The issue arises in the AclService::updateRequestWithACL function, where usernames are interpolated into SQL LIKE patterns without properly escaping the wildcard characters '_' and '%'. This flaw allows self-registered attackers to exploit the ACL matching process by using usernames that over-match ACL tokens. As a result, they can access pages and Bazar entries that are restricted to other users or groups, through the public Bazar listing API.
Users can update to YesWiki version 4.7.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 27, 2026CISA-ADP
Assessed Nov 2, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94 | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/YesWiki/yeswiki/commit/f3b0dd093a7ace47dc29a515faeb02635baceae2 | [email protected] | Source CodeVendor |
| https://github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94 | [email protected] | AdvisoryExploitRemedyVendor |
| https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-read-acl-bypass-via-sql-like-wildcards-in-usernames | [email protected] | AdvisoryRemedy |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-89 | Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| YesWiki | <= 4.6.7 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 2, 2026 | CVE Modified | CISA-ADP |
| Oct 27, 2026 | New CVE Received | [email protected] |