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TI-2021-16529 Aliases CVE-2021-39143

Path Traversal in spinnaker

Priority MEDIUM 64CWE-22Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
High · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

Spinnaker is an open source, multi-cloud continuous delivery platform. A path traversal vulnerability was discovered in uses of TAR files by AppEngine for deployments. This uses a utility to extract files locally for deployment without validating the paths in that deployment don't override system files. This would allow an attacker to override files on the container, POTENTIALLY introducing a MITM type attack vector by replacing libraries or injecting wrapper files. Users are advised to update as soon as possible. For users unable to update disable Google AppEngine deployments and/or disable artifacts that provide TARs.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00356 29th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed spinnaker (spinnaker): 1.26.7, 1.25.7, 1.24.7

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
spinnakerspinnaker1.26.0 to before 1.26.7; 1.25.0 to before 1.25.7; before 1.24.71.26.7, 1.25.7, 1.24.7Patch availableCNA
  • spinnaker Vendorspinnaker Affected 1.26.0 to before 1.26.7; 1.25.0 to before 1.25.7; before 1.24.7 Fixed in 1.26.7, 1.25.7, 1.24.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:linuxfoundation:spinnaker:*:*:*:*:*:*:*:*before 1.24.7; 1.25.0 to before 1.25.7; 1.26.0 to before 1.26.7Vulnerablebackstage
  • cpe:2.3:a:linuxfoundation:spinnaker:*:*:*:*:*:*:*:* Versions before 1.24.7; 1.25.0 to before 1.25.7; 1.26.0 to before 1.26.7 Vulnerable ·backstage

Remediation

  • Fix · CNA spinnaker (spinnaker) Fixed in 1.26.7, 1.25.7, 1.24.7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2021-39143

References

Exploit 1

  • TI-2021-19638 Improper Access Control in spinnaker CVSS 3.1CRITICAL 10.0
  • TI-2026-25122 Spinnaker vulnerable to RCE via expression parsing due to unrestricted context handling CVSS 3.1CRITICAL 10.0
  • TI-2026-25113 Improper input validation in spinnaker CVSS 3.1CRITICAL 10.0
  • TI-2026-32679 Spinnaker: Non-safe yaml deserialization allowing RCE when using specific types CVSS 3.1HIGH 8.8
  • TI-2026-39859 Spinnaker: Improper yaml processing on kustomize bake operations CVSS 3.1HIGH 7.5
  • TI-2020-07437 Server-side request forgery in Netflix Orca Spinnaker CVSS 3.1HIGH 7.5
See all 9 →

Sources

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