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CVE-2026-25534

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

Published: Mar 17, 2026Updated: Apr 16, 2026 Sources: CVE List NVD GHSACWE-918
NVD MITRE
9.1CVSSCRITICAL
EPSS Score
0.2%
Top 84.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

Description

### 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.

CVSS Vector Breakdown

AV:NAC:LPR:LUI:NS:CC:HI:LA:L
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:LPrivileges Required
Low
UI:NUser Interaction
None
Scope
S:CScope
Changed
Impact
C:HConfidentiality
High
I:LIntegrity
Low
A:LAvailability
Low
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Weaknesses

CWE-918

Affected Products

clouddriver-artifactsio.spinnaker.clouddriver
Library
Cloud & SaaS / container-orchestration
orca-coreio.spinnaker.orca
Library
Cloud & SaaS / container-orchestration
io.spinnaker.clouddriver:clouddriver-artifactsMavenOSS Libraries
io.spinnaker.orca:orca-coreMavenOSS Libraries
io.spinnaker.clouddriveross-projectCloud & SaaS
io.spinnaker.orcaoss-projectCloud & SaaS
mavenpackage-ecosystemOSS Libraries

Attack Graph

Products CVE Techniques Tactics

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Exploitability

Official Patch Available

MITRE ATT&CK

2 techniques
Command and Control
Initial Access
View detailed technique mapping

References

https://github.com/spinnaker/spinnaker/commit/7c4737906239a958a468e843239c6785b03d0eda
github.com
https://github.com/spinnaker/spinnaker/security/advisories/GHSA-8r8j-gfhg-fw38
github.com
https://github.com/spinnaker/spinnaker/security/advisories/GHSA-vrjc-q2fh-6x9h
github.com
and 2 more references View all →

Timeline

Published
Mar 17, 2026
Last Updated
Apr 16, 2026

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