# CVE-2026-12355: IBM MQ Resource Adapter IVT servlet is vulnerable to unauthenticated remote code execution

> Unauthenticated attackers can execute arbitrary code or disclose information via JNDI injection in the IBM MQ Resource Adapter IVT servlet.

- **Severity:** High 8.1 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 15 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-g8xm-rxm3-h7mp

## What is CVE-2026-12355?

CVE-2026-12355 is a high-severity code injection vulnerability in IBM MQ, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

IBM MQ 9.1.0.0 through 9.1.0.37 LTS, 9.2.0.0 through 9.2.0.43 LTS, 9.3.0.0 through 9.3.0.41 LTS, 9.3.0.0 through 9.3.5.1 CD, 9.4.0.0 through 9.4.0.25 LTS, 9.4.0.0 through 9.4.5.1 CD, and 10.0.0.0 could allow an attacker to perform JNDI injection attacks due to insufficient input validation, potentially leading to information disclosure or remote code execution.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component)

## Which versions are affected by CVE-2026-12355?


## How do I fix CVE-2026-12355?

No fix has been published for CVE-2026-12355 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-12355 being exploited?

There is no known exploitation of CVE-2026-12355 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-12355 and fix it if it is affected.

What it is: CVE-2026-12355 is a high-severity code injection vulnerability in IBM MQ, published on 15 Sep 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-2026-12355 in the wild and no public exploit code.

Affected product: IBM MQ. 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-2026-12355/ (Markdown: https://insights.sbomify.com/CVE-2026-12355/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-12355
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-12355
- OSV: https://osv.dev/vulnerability/CVE-2026-12355

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-12355/
Summaries are generated and may contain mistakes; the official description above is the record.