CVE-2026-116821: SQL Injection (CVSS 6.5)

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.

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CVSS v3.1 Score

6.5

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness Type (CWE)

CWE-89 SQL Injection

References

Other References

https://github.com/YesWiki/yeswiki/commit/f3b0dd093a7ace47dc29a515faeb02635baceae2 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-sql-like-wildcards-in-usernames

Frequently Asked Questions

What is CVE-2026-116821? +

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. It has a CVSS v3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-116821? +

CVE-2026-116821 has a CVSS v3.1 score of 6.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

How do I check if I'm vulnerable to CVE-2026-116821? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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