High 8.0Published Sep 2, 2026

CVE-2026-52831Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE

Updated under an hour ago (2026-10-19 10:10 UTC)

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No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 8.0 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-78
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Sep 3, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

nuclio nuclio nuclio:nuclio (from the name)	before 1.16.4	CNA record

References

https://github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7px-refsource-confirm
https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dedex-refsource-misc
https://github.com/nuclio/nuclio/releases/tag/1.16.4x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.