CVE-2026-29042 Details
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.
A command injection vulnerability has been identified in the Nuclio serverless framework, specifically within the Shell Runtime component, in versions prior to 1.15.20. This vulnerability allows attackers to inject arbitrary commands through the X-Nuclio-Arguments HTTP header. The injected commands are executed with root privileges in the function's container, enabling unauthorized access to sensitive information such as Kubernetes ServiceAccount tokens, which can be exploited for cluster-admin access.
Users can update to Nuclio version 1.15.20 or later, where this vulnerability has been patched. For those unable to update, consider disabling the Shell Runtime component or restricting who can deploy functions using RBAC.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Mar 9, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/nuclio/nuclio/commit/5352d7e16cf92f4350a2f8d806c4b80b626b5c5a | [email protected] | Patch |
| https://github.com/nuclio/nuclio/pull/4030 | [email protected] | Issue TrackingPatch |
| https://github.com/nuclio/nuclio/releases/tag/1.15.20 | [email protected] | ProductRelease Notes |
| https://github.com/nuclio/nuclio/security/advisories/GHSA-95fj-3w7g-4r27 | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-75 | Failure to Sanitize Special Elements into a Different Plane (Special Element Injection) | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| iguazio nuclio | < 1.15.20 |
CPE
Remediation
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Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Mar 10, 2026 | Initial Analysis | [email protected] |
| Mar 6, 2026 | New CVE Received | [email protected] |