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CVE-2026-52831

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

Published: Sep 2, 2026Updated: Sep 3, 2026 Sources: CVE List NVDCWE-78
8.0HIGH
NVD MITRE
EPSS Score
0.3%
Top 75.6%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
No Fix Available
Self-Check
Not available

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:HPR:HUI:NS:CC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-78

Affected Products

nuclio
oss-project
nuclioOn-prem
Cloud & SaaS / container-orchestration

Exploitability

No known exploits, KEV entries, or remediation guidance available for this vulnerability yet.
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

1 technique
Execution
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References

https://github.com/nuclio/nuclio/security/advisories/GHSA-v5px-423j-pf7p
github.com
https://github.com/nuclio/nuclio/commit/3356b86a8bfab3f960aa420310ebff765df9dede
github.com
https://github.com/nuclio/nuclio/releases/tag/1.16.4
github.com

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