CVE-2026-116821
YesWiki before 4.7.0 Read-ACL Bypass via SQL LIKE Wildcards in Usernames
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.
Fixes and workarounds
Fix
The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.
Source: CNA: VulnCheckAffected products and versions
| Product | Versions | Authority |
|---|---|---|
| yeswiki YesWiki |
≥ 0; < 4.7.0 (affected, semver) 4.7.0 (unaffected, semver) Other versions: unaffected |
CNA: VulnCheck |
Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.
CVSS assessments
| Version / score | Vector | Authority |
|---|---|---|
| 4.0 / 7.1 high |
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N | CNA: VulnCheck |
| 3.1 / 6.5 medium |
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | CNA: VulnCheck |
Exploit evidence
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94
exploit · ADP: CISA-ADP
References
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94CNA: VulnCheck · vendor-advisory
- https://github.com/YesWiki/yeswiki/commit/f3b0dd093a7ace47dc29a515faeb02635baceae2CNA: VulnCheck · patch
- https://www.vulncheck.com/advisories/yeswiki-before-4.7.0-read-acl-bypass-via-sql-like-wildcards-in-usernamesCNA: VulnCheck · third-party-advisory
- https://github.com/YesWiki/yeswiki/security/advisories/GHSA-q5j6-79p7-mp94ADP: CISA-ADP · exploit
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