CVE-2026-25534CWE-918

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

Critical · published March 17, 2026

CVSS v3.1
9.1
EPSS
0%
Percentile
35.3
In the wild
Unconfirmed
What it is

### Impact

Spinnaker updated URL Validation logic on user input to provide sanitation on user inputted URLs for clouddriver. However, they missed that Java URL objects do not correctly handle underscores on parsing. This led to a bypass of the previous CVE (CVE-2025-61916) through the use of carefully crafted URLs. Note, Spinnaker found this not just in that CVE, but in the existing URL validations in Orca fromUrl expression handling. This CVE impacts BOTH artifacts as a result.

### Patches

This has been merged and will be available in versions 2025.4.1, 2025.3.1, 2025.2.4 and 2026.0.0.

### Workarounds

You can disable the various artifacts on this system to work around these limits.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00421 · 35.3th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-03-17T17:27Z
EPSS history
Timeline
  • 17 MAR 17:27Z
    Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames
    cvelistv5