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Fencer Vulns
critical 9.1

CVE-2026-25534 json

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

published 2026-03-16 7 mo ago modified 2026-09-01 2 mo ago also EUVD-2026-12592 , GHSA-8r8j-gfhg-fw38

cvss
9.1
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 18%
public exploits
0
none known

Summary

### 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.

Patch / fix

  • maven io.spinnaker.clouddriver:clouddriver-artifacts 2025.2.4, 2025.3.1, 2025.4.1
  • maven io.spinnaker.orca:orca-core 2025.2.4, 2025.3.1, 2025.4.1
  • io.spinnaker.clouddriver clouddriver-artifacts 2025.2.4, 2025.3.1, 2025.4.1

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
7 mo ago

Exploit prediction

0.26% chance of exploitation in the next 30 days, higher than 18% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
GitHub 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

Affected packages

ecosystem package affected fixed in
maven io.spinnaker.clouddriver:clouddriver-artifacts
>=2025.1.6, <2025.2.4
>=2025.3.0, <2025.3.1
>=2025.4.0, <2025.4.1
2025.2.4
2025.3.1
2025.4.1
maven io.spinnaker.orca:orca-core
>=2025.1.6, <2025.2.4
>=2025.3.0, <2025.3.1
>=2025.4.0, <2025.4.1
2025.2.4
2025.3.1
2025.4.1

Affected products

  • io.spinnaker.clouddriver clouddriver-artifacts
  • io.spinnaker.orca orca-core

Classification

Weakness
  • CWE-918 Server-Side Request Forgery

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.