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.
- 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-2026-79756?
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
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.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-79756 being exploited?
There is no known exploitation of CVE-2026-79756 in the wild and no public exploit code.
Sources
Also known as GHSA-mq8w-f7w8-5rgg.