Vulnerability · Published Mar 6, 2026 · Assigned by GitHub_M

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

High 8.9

In plain English

A high-severity security flaw in nuclio from nuclio. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.6% (higher than 85% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)8.9High

Exploit odds (30 days)2.6%top 14.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Go	github.com/nuclio/nuclio	1.15.20	GHSA-95fj-3w7g-4r27
Go	github.com/nuclio/nuclio	no fix listed	GO-2026-4598

Affected products (as reported)

Vendor	Product	Versions
nuclio	nuclio	< 1.15.20

Weakness: CWE-75 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P

References

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