# CVE-2026-11408: vertex-app vertex Log Viewer Endpoint LogMod.js os command injection

> Remote attackers can execute arbitrary OS commands via the Log Viewer Endpoint in vertex-app vertex, requiring a patch to mitigate.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Jun 2026
- **Updated:** 8 Jun 2026
- **Also known as:** GHSA-cx7v-5xwm-4mqw

## What is CVE-2026-11408?

CVE-2026-11408 is a medium-severity command injection vulnerability in vertex-app vertex, published on 6 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was identified in vertex-app vertex up to 2026.02.12. This issue affects some unknown processing of the file app/model/LogMod.js of the component Log Viewer Endpoint. Such manipulation of the argument req.query leads to os command injection. The attack can be executed remotely. The exploit is publicly available and might be used. The name of the patch is 805d82e7100d49b79b3beb1b9420e8e458987198. It is best practice to apply a patch to resolve this issue.

Weakness: CWE-78 (Improper Neutralization of Special Elements used in an OS Command), CWE-77 (Improper Neutralization of Special Elements used in a Command)

## Which versions are affected by CVE-2026-11408?


## How do I fix CVE-2026-11408?

No fix has been published for CVE-2026-11408 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-11408 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11408 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-11408 and fix it if it is affected.

What it is: CVE-2026-11408 is a medium-severity command injection vulnerability in vertex-app vertex, published on 6 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-11408 exists.

Affected product: vertex-app vertex. 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-2026-11408/ (Markdown: https://insights.sbomify.com/CVE-2026-11408/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-11408
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-11408
- OSV: https://osv.dev/vulnerability/CVE-2026-11408

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-11408/
Summaries are generated and may contain mistakes; the official description above is the record.