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TI-2026-55233 Aliases CVE-2026-79754

Nuclio: Kaniko build tempDir command injection

Priority MEDIUM 64CWE-77Published · Updated

Key facts

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

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-77.

Summary

Nuclio is a "Serverless" framework for Real-Time Events and Data Processing. From version 1.6.19 to before version 1.17.2, Nuclio's Dashboard build pipeline does not sanitize the spec.build.tempDir field before using it to construct a shell command. When the Kaniko container builder is enabled, a user with function-create permission can inject shell metacharacters into this field and achieve arbitrary command execution inside the Dashboard container, which runs with a Kubernetes service account holding wildcard access to Secrets, Pods, Jobs, and Deployments in its namespace. This issue has been patched in version 1.17.2.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00715 53rd percentileScored 2026-11-07
Fix Fixed nuclio (nuclio): 1.17.2

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
nuclionuclio1.6.19 to before 1.17.21.17.2Patch availableCNA
  • nuclio Vendornuclio Affected 1.6.19 to before 1.17.2 Fixed in 1.17.2 Patch available CNA

Remediation

  • Fix · CNA nuclio (nuclio) Fixed in 1.17.2

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-79754

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-2026-37940 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
  • TI-2026-37939 Nuclio: Unsanitized cron trigger event headers/body injected into CronJob shell command leads to persistent RCE CVSS 3.1HIGH 8.0

Sources

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