What’s Vulnerable › Vulnerabilities

CVE-2026-29042: Nuclio Shell Runtime Command Injection Leading to Privilege Escalation

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-06 · updated 2026-06-17
• Weakness: CWE-75

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.

Affected products

• nuclio: before 1.15.20 — fixed in 1.15.20

How to fix

Upgrade to a fixed version: nuclio 1.15.20. Check the vendor advisory for mitigations.

References

• https://github.com/nuclio/nuclio/commit/5352d7e16cf92f4350a2f8d806c4b80b626b5c5a
• https://github.com/nuclio/nuclio/pull/4030
• https://github.com/nuclio/nuclio/releases/tag/1.15.20
• https://github.com/nuclio/nuclio/security/advisories/GHSA-95fj-3w7g-4r27

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