CVE-2026-25534: Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames
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.
Published Mar 16, 2026 · Updated Sep 1, 2026
Affected packages
io.spinnaker.clouddriver:clouddriver-artifacts
- Ecosystem
- Maven
- Affected
- >= 2025.3.0, < 2025.3.1
- Fixed in
- 2025.3.1
- Check
mvn dependency:tree -Dincludes=io.spinnaker.clouddriver:clouddriver-artifacts
io.spinnaker.clouddriver:clouddriver-artifacts
- Ecosystem
- Maven
- Affected
- >= 2025.4.0, < 2025.4.1
- Fixed in
- 2025.4.1
- Check
mvn dependency:tree -Dincludes=io.spinnaker.clouddriver:clouddriver-artifacts
io.spinnaker.orca:orca-core
- Ecosystem
- Maven
- Affected
- >= 2025.3.0, < 2025.3.1
- Fixed in
- 2025.3.1
- Check
mvn dependency:tree -Dincludes=io.spinnaker.orca:orca-core
io.spinnaker.orca:orca-core
- Ecosystem
- Maven
- Affected
- >= 2025.4.0, < 2025.4.1
- Fixed in
- 2025.4.1
- Check
mvn dependency:tree -Dincludes=io.spinnaker.orca:orca-core
io.spinnaker.clouddriver:clouddriver-artifacts
- Ecosystem
- Maven
- Affected
- >= 2025.1.6, < 2025.2.4
- Fixed in
- 2025.2.4
- Check
mvn dependency:tree -Dincludes=io.spinnaker.clouddriver:clouddriver-artifacts
io.spinnaker.orca:orca-core
- Ecosystem
- Maven
- Affected
- >= 2025.1.6, < 2025.2.4
- Fixed in
- 2025.2.4
- Check
mvn dependency:tree -Dincludes=io.spinnaker.orca:orca-core
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
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.
Credited to jaydhulia, jasonmcintosh, sealbenb.
References
- https://github.com/spinnaker/spinnaker/security/advisories/GHSA-8r8j-gfhg-fw38
- https://github.com/spinnaker/spinnaker/security/advisories/GHSA-vrjc-q2fh-6x9h
- https://github.com/spinnaker/spinnaker/commit/7c4737906239a958a468e843239c6785b03d0eda
- https://nvd.nist.gov/vuln/detail/CVE-2026-25534
- https://github.com/advisories/GHSA-8r8j-gfhg-fw38
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology