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CVE-2026-25534

9.1 · CRITICAL

### Impact Spinnaker updated URL Validation logic on user input to provide sanitation on user inputted URLs for clouddriver.

Published Mar 17, 2026CWE-918EPSS 0.42%

Overview

CVE-2026-25534 is a critical-severity vulnerability. It was published on March 17, 2026 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/spinnaker/spinnaker/commit/7c4737906239a958a468e843239c6785b03d0edaGitHubgithub.com/spinnaker/spinnaker/security/advisories/GHSA-8r8j-gfhg-fw38GitHubgithub.com/spinnaker/spinnaker/security/advisories/GHSA-vrjc-q2fh-6x9h

How CyberStrike helps

Frequently asked questions

What is CVE-2026-25534?

CVE-2026-25534 is a critical-severity vulnerability. It was published on March 17, 2026 and has a CVSS 3.1 base score of 9.1 (CRITICAL).

How severe is CVE-2026-25534?

This vulnerability has a CVSS 3.1 base score of 9.1, rated CRITICAL. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-25534?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-25534?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-25534 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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