CVE-2026-25534: io.spinnaker.clouddriver clouddriver-artifacts Server-Side Request Forgery (SSRF)

Vulnerability summary

CVE-2026-25534 is a critical (CVSS 9.1) Server-Side Request Forgery (SSRF) vulnerability in io.spinnaker.clouddriver clouddriver-artifacts. EPSS estimates a 0.42% chance of exploitation in the next 30 days, higher than 35% of scored vulnerabilities.

Timeline

1. 17-03-2026
   PublishedVulnerability first disclosed.
2. 17-03-2026
   Last modifiedVulnerability information updated.

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.

• CWE-918Server-Side Request Forgery (SSRF)The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.