CVE-2026-52770 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') in yeswiki/yeswiki
Unauthenticated attackers can inject SQL into YesWiki's Bazar entry-listing APIs to infer database contents via boolean-based blind injection.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-52770?
CVE-2026-52770 is a high-severity SQL injection vulnerability in yeswiki, published on 4 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
YesWiki is a wiki system written in PHP. Prior to version 4.6.6, YesWiki’s public Bazar entry-listing APIs are vulnerable to unauthenticated SQL injection in numeric query / queries filters. For Bazar fields whose value structure is numeric, YesWiki escapes the attacker-controlled filter value but inserts it into SQL without quotes or numeric validation. An unauthenticated attacker can inject boolean SQL expressions and infer database contents from whether entries are returned. This issue has been patched in version 4.6.6.
Weakness: CWE-89
Which versions are affected by CVE-2026-52770?
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-2026-52770?
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-2026-52770 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-52770 exists.
Sources
Also known as GHSA-qg78-vmvc-fhjw.