CVE-2026-40331 Masa CMS unauthenticated SQL injection via altTable parameter in JSON API
Unauthenticated attackers can inject SQL via the altTable parameter to read sensitive database data, including credentials, requiring an upgrade to patched versions.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-40331?
CVE-2026-40331 is a critical SQL injection vulnerability in MasaCMS, published on 5 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Masa CMS is an open source content management system. In versions 7.2.0 through 7.2.9, 7.3.0 through 7.3.14, 7.4.0 through 7.4.9, and 7.5.0 through 7.5.2, the unauthenticated JSON API accepts an altTable parameter that is stored via the setAltTable() method without validation or sanitization. This value is injected directly into a SQL FROM clause within feedGateway.cfc. An unauthenticated attacker can pass an arbitrary subquery into the altTable parameter to read sensitive data from any table in the database in a single HTTP request, including administrative credentials and password reset tokens.
This issue has been fixed in versions 7.2.10, 7.3.15, 7.4.10, and 7.5.3. As a workaround, apply validation to the setAltTable function in core/mura/content/feed/feedBean.cfc to restrict input to simple alphanumeric table names, or disable the JSON API if it is not required.
Weakness: CWE-89
Which versions are affected by CVE-2026-40331?
How do I fix CVE-2026-40331?
No fix has been published for CVE-2026-40331 yet. Limit exposure of the affected software until one is available.
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-2026-40331 being exploited?
There is no known exploitation of CVE-2026-40331 in the wild and no public exploit code.
Sources
Also known as GHSA-jphh-r686-6w7j.