CVE-2026-52831CWE-78command-injection

CVE-2026-52831

High · published September 2, 2026

CVSS v3.1
8.0
EPSS
1%
Percentile
44.3
In the wild
Unconfirmed
What it is

Nuclio 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.

The record
Technical detail
CVSS v3.1
8.0 · HIGH
Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00534 · 44.3th percentile
Weakness
CWE-78 · Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Published
2026-09-02T21:17Z
References (3)
https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede · [email protected]https://github.com/nuclio/nuclio/releases/tag/1.16.4 · [email protected]https://github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7p · [email protected]
EPSS history
Timeline
  • 04 SEP 03:42Z
    EPSS moved — → 0%
    epss
  • 02 SEP 16:40Z
    Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE
    cvelistv5