CVE-2026-52831
Published:July 08, 2026
Updated:August 27, 2026
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 — interpolated verbatim inside double-quoted "--header" arguments ("lazy.go:2150"); any key containing """ breaks the quoting context. - "event.body" — processed with "strconv.Quote", which escapes """ and "\" but not "$()", allowing command substitution ("lazy.go:2188"). Both paths were dynamically verified on Nuclio 1.15.27 (latest as of 2026-05-17). - CVSS 3.1: "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H" — 9.9 (Critical) - CWE: CWE-78 (Improper Neutralization of Special Elements used in an OS Command) - Affected versions: Nuclio <= 1.15.27 (latest, dynamically verified) ***
Affected Packages
https://github.com/nuclio/nuclio.git (GITHUB):
Affected version(s) >=stable <1.16.4Fix Suggestion:
Update to version 1.16.4github.com/nuclio/nuclio (GO):
Affected version(s) >=stable <1.16.4Fix Suggestion:
Update to version 1.16.4Related Resources (4)
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Contact UsCVSS v4
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
HIGH
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
HIGH
CVSS v3
Base Score:
10
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Weakness Type (CWE)
Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')