CVE-2026-79754 Nuclio: Kaniko build tempDir command injection
Attackers with function-create permissions can inject shell commands via the tempDir field when Kaniko is enabled, leading to arbitrary code execution and privilege escalation.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-79754?
CVE-2026-79754 is a high-severity command injection vulnerability in nuclio, published on 2 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. From version 1.6.19 to before version 1.17.2, Nuclio's Dashboard build pipeline does not sanitize the spec.build.tempDir field before using it to construct a shell command. When the Kaniko container builder is enabled, a user with function-create permission can inject shell metacharacters into this field and achieve arbitrary command execution inside the Dashboard container, which runs with a Kubernetes service account holding wildcard access to Secrets, Pods, Jobs, and Deployments in its namespace. This issue has been patched in version 1.17.2.
Weakness: CWE-77
Which versions are affected by CVE-2026-79754?
How do I fix CVE-2026-79754?
No fix has been published for CVE-2026-79754 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-2026-79754 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-79754 exists.
Sources
Also known as GHSA-x44h-qmrv-mh72.