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CRITICAL

CVE-2026-29042

Nuclio Shell Runtime Command Injection Leading to Privilege Escalation

CVSS v3

9.8

CRITICAL

EPSS Score

3.3 %

exploit probability, as of 2026-09-25

CISA KEV

No

known exploited

Exploitation

poc

SSVC status

Description

Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.15.20, the Nuclio Shell Runtime component contains a command injection vulnerability in how it processes user-supplied arguments. When a function is invoked via HTTP, the runtime reads the X-Nuclio-Arguments header and directly incorporates its value into shell commands without any validation or sanitization. This issue has been patched in version 1.15.20.

Technical details

Published
2026-03-06
Last Modified
2026-03-10

Frequently asked questions

What is CVE-2026-29042?

Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.15.20, the Nuclio Shell Runtime component contains a command injection vulnerability in how it processes user-supplied arguments. When a function is invoked via HTTP, the runtime reads the X-Nuclio-Arguments header and directly incorporates its value into shell commands without any validation or sanitization. This issue has been patched in version 1.15.20.

Is CVE-2026-29042 actively exploited?

A proof-of-concept exploit exists for CVE-2026-29042, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2026-29042?

CVE-2026-29042 has a CVSS v3 base score of 9.8 (CRITICAL severity).

Is CVE-2026-29042 affecting your environment?

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