Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-52831
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-02 17:17:45 UTC
Updated2026-09-03 15:17:30 UTC
DescriptionNuclio is a "Serverless" framework for Real-Time Events and Data Processing. Prior to version 1.16.4, the Nuclio controller builds a curl invocation string for each cron trigger and stores it as the args of a Kubernetes CronJob container (/bin/sh, -c, <command>). Two fields in the trigger specification flow into this string without adequate sanitization: event.headers keys and event.body. This issue has been patched in version 1.16.4.

Risk And Classification

Primary CVSS: v3.1 8 HIGH from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS: 0.003190000 probability, percentile 0.243490000 (date 2026-09-03)

Problem Types: CWE-78 | CWE-78 CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8HIGHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
3.1CNADECLARED8HIGHCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Changed
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Nuclio Nuclio affected < 1.16.4 Not specified

References

ReferenceSourceLinkTags
github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7p [email protected] github.com
github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede [email protected] github.com
github.com/nuclio/nuclio/releases/tag/1.16.4 [email protected] github.com
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