CVE-2026-52775 YesWiki Authenticated SQL Injection in ReactionManager
Authenticated users can inject arbitrary SQL via URL parameters in YesWiki, allowing unauthorized data access or modification.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-52775?
CVE-2026-52775 is a high-severity SQL injection vulnerability in yeswiki, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki through the latest development branch contains a SQL injection vulnerability in ReactionManager::deleteUserReaction() that allows any authenticated user to inject arbitrary SQL via the {idreaction} and {id} URL path parameters. The parameters are concatenated directly into a SQL LIKE clause without escaping or parameterization. This issue has been patched in version 4.6.6.
Weakness: CWE-89
Which versions are affected by CVE-2026-52775?
2 open source packages ship an affected version, including yeswiki/yeswiki.
| Package | Affected | Fixed in |
|---|---|---|
yeswiki/yeswiki Packagist | All versions | 4.6.6 |
yeswiki/yeswiki Packagist | All versions | 4.6.6 |
How do I fix CVE-2026-52775?
Upgrade yeswiki/yeswiki to 4.6.6 or later.
Use parameterised queries everywhere and never build SQL by joining strings. Upgrade affected software first; a web application firewall only buys time. More about SQL injection.
Is CVE-2026-52775 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52775 exists.
Sources
Also known as GHSA-4pf7-cc4r-g63h.