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TI-2026-37939 Aliases CVE-2026-52831GHSA-v5px-423j-pf7p

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

Priority LOW 38CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
High
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-78.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00534 45th percentileScored 2026-11-07
Fix Fixed nuclio (nuclio): 1.16.4github.com/nuclio/nuclio (Go): 0.0.0-20260601075854-3356b86a8bfa

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
nuclionucliobefore 1.16.41.16.4Patch availableCNA
—github.com/nuclio/nuclio (Go)before 0.0.0-20260601075854-3356b86a8bfa0.0.0-20260601075854-3356b86a8bfaPatch availableGHSA-v5px-423j-pf7p
  • nuclio Vendornuclio Affected before 1.16.4 Fixed in 1.16.4 Patch available CNA
  • github.com/nuclio/nuclio (Go) Vendor— Affected before 0.0.0-20260601075854-3356b86a8bfa Fixed in 0.0.0-20260601075854-3356b86a8bfa Patch available GHSA-v5px-423j-pf7p

Remediation

  • Fix · CNA nuclio (nuclio) Fixed in 1.16.4
  • Fix · GHSA-v5px-423j-pf7p github.com/nuclio/nuclio (Go) Fixed in 0.0.0-20260601075854-3356b86a8bfa Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-52831
  2. 2026-10-03 Alias added: GHSA-v5px-423j-pf7p

References

Other 4

  • TI-2026-55234 Nuclio: Unauthenticated OS command injection via function namespace in docker ps --filter label (local Docker platform) CVSS 3.1HIGH 8.0
  • TI-2026-37941 Nuclio: Unsanitized runtimeAttributes.repositories injected into Groovy build.gradle leads to build-time RCE CVSS 3.1HIGH 8.0
  • TI-2026-33468 Nuclio: Missing authorization on project write paths allows any authenticated user to modify or delete any project CVSS 3.1HIGH 8.3
  • TI-2026-55233 Nuclio: Kaniko build tempDir command injection CVSS 4.0HIGH 7.1
  • TI-2026-37940 Nuclio: Unauthenticated path traversal in spec.handler allows arbitrary file write in Dashboard container CVSS 3.1MEDIUM 4.9
  • TI-2026-55235 Nuclio: Unauthenticated OS command injection via namespace header in list-all resource path on local platform CVSS 4.0HIGH 8.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences