# CVE-2026-79756: Nuclio: Unauthenticated OS command injection via namespace header in list-all resource path on local platform

> Unauthenticated attackers can execute arbitrary OS commands in the Nuclio dashboard container via malicious namespace headers.

- **Severity:** High 8.7 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/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:** 2 Sep 2026
- **Updated:** 3 Sep 2026
- **Also known as:** GHSA-mq8w-f7w8-5rgg

## What is CVE-2026-79756?

CVE-2026-79756 is a high-severity command injection vulnerability in nuclio, published on 2 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.17.4, the fix for unauthenticated OS command injection in the nuclio dashboard on the local/Docker platform is incomplete. The fix added validateFunctionName for function names and common.Quote() for the named-resource shell command path, but the list-all resource path (triggered when no specific resource name is provided) still interpolates the resourceNamespace parameter unquoted into a /bin/sh -c command string. An unauthenticated attacker can inject shell metacharacters via the X-Nuclio-Function-Namespace, X-Nuclio-Project-Namespace, or X-Nuclio-Function-Event-Namespace HTTP headers to achieve arbitrary command execution inside the dashboard container. This issue has been patched in version 1.17.4.

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

## Which versions are affected by CVE-2026-79756?


## How do I fix CVE-2026-79756?

No fix has been published for CVE-2026-79756 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-79756 being exploited?

There is no known exploitation of CVE-2026-79756 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-79756 and fix it if it is affected.

What it is: CVE-2026-79756 is a high-severity command injection vulnerability in nuclio, published on 2 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-2026-79756 in the wild and no public exploit code.

Affected product: nuclio. 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-2026-79756/ (Markdown: https://insights.sbomify.com/CVE-2026-79756/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-79756
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-79756
- OSV: https://osv.dev/vulnerability/CVE-2026-79756

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-79756/
Summaries are generated and may contain mistakes; the official description above is the record.