What is CVE-2026-116821?

CVE-2026-116821 is a medium-severity vulnerability in Yeswiki, classified under SQL Injection. CVSS score: 6.5/10. Published 2026-10-27.

How severe is CVE-2026-116821?

Medium severity. CVSS v3 base score is 6.5 out of 10.

SQL Injection in Yeswiki

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.

Vulnerability class: SQL Injection

Published 2026-10-27 · last modified 2026-10-27.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

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

Yeswiki

Weakness classification (CWE)

CWE-89 — SQL Injection

References

github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94 (vendor-advisory)
github.com/YesWiki/yeswiki/commit/f3b0dd093a7ace47dc29a515faeb02635baceae2 (patch)
www.vulncheck.com/advisories/yeswiki-before-4.7.0-read-acl-bypass-via-sql-like-… (third-party-advisory)

Frequently asked questions

What is CVE-2026-116821?: CVE-2026-116821 is a medium-severity vulnerability in Yeswiki, classified under SQL Injection. CVSS score: 6.5/10. Published 2026-10-27.
How severe is CVE-2026-116821?: Medium severity. CVSS v3 base score is 6.5 out of 10.