# 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.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 5 May 2026
- **Updated:** 6 May 2026
- **Also known as:** GHSA-jphh-r686-6w7j

## 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 (Improper Neutralization of Special Elements used in an SQL Command)

## 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.

## Is CVE-2026-40331 being exploited?

There is no known exploitation of CVE-2026-40331 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40331 and fix it if it is affected.

What it is: 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.
Exploitation: There is no known exploitation of CVE-2026-40331 in the wild and no public exploit code.

Affected product: MasaCMS. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-40331/ (Markdown: https://insights.sbomify.com/CVE-2026-40331/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40331
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40331
- OSV: https://osv.dev/vulnerability/CVE-2026-40331

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40331/
Summaries are generated and may contain mistakes; the official description above is the record.