Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS

9.1 · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

EPSS

• CVE-2026-25534: 0.26% estimated exploitation activity in the next 30 days; percentile 18.01 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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.

Published by the source

16 Mar 2026, 15:15 UTC

Last modified by the source

1 Sep 2026, 16:00 UTC

Source last checked

26 Oct 2026, 16:55 UTC

1. Revision 1 · created · 26 Oct 2026

   Published from ghsa record GHSA-8r8j-gfhg-fw38

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# Patch Next advisory brief: CVE-2026-25534

Advisory: Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames
IDs: CVE-2026-25534, GHSA-8r8j-gfhg-fw38
Record: https://patchnext.com/advisories/cve-2026-25534 (revision 1, source checked 26 Oct 2026, 16:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Critical (CVSS 9.1)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: io.spinnaker.orca:orca-core 2025.4.1, 2025.3.1, 2025.2.4; io.spinnaker.clouddriver:clouddriver-artifacts 2025.4.1, 2025.3.1, 2025.2.4. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven io.spinnaker.orca:orca-core: affected >= 2025.3.0, < 2025.3.1; >= 2025.4.0, < 2025.4.1; >= 2025.1.6, < 2025.2.4; fixed in 2025.3.1, 2025.2.4, 2025.4.1
- Maven io.spinnaker.clouddriver:clouddriver-artifacts: affected >= 2025.3.0, < 2025.3.1; >= 2025.4.0, < 2025.4.1; >= 2025.1.6, < 2025.2.4; fixed in 2025.3.1, 2025.2.4, 2025.4.1

## Suggested inspection (read-only)
- Maven io.spinnaker.orca:orca-core: check the installed version with your package manager.
- Maven io.spinnaker.clouddriver:clouddriver-artifacts: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on io.spinnaker.orca:orca-core, io.spinnaker.clouddriver:clouddriver-artifacts.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://github.com/advisories/GHSA-8r8j-gfhg-fw38 (GitHub-reviewed advisory GHSA-8r8j-gfhg-fw38 lists affected ranges: Maven io.spinnaker.clouddriver:clouddriver-artifacts >=2025.3.0 =2025.4.0 =2025.1.6 =2025.3.0 =2025.4.0 =2025.1.6 <2025.2.4)

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