CVE-2026-25534 — Vulnerability in io.spinnaker.orca:orca-core —...

CRITICAL

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

Published March 16, 2026Updated September 1, 2026Source: osv

Summary

### 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.

Advisory Timeline

First published March 16, 2026 (210 days ago).
Last revised September 1, 2026 — 169 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

Maven

Update io.spinnaker.orca:orca-core to 2025.3.1 or later

<!-- Update pom.xml dependency version to 2025.3.1 for io.spinnaker.orca:orca-core -->

Maven

Update io.spinnaker.clouddriver:clouddriver-artifacts to 2025.3.1 or later

<!-- Update pom.xml dependency version to 2025.3.1 for io.spinnaker.clouddriver:clouddriver-artifacts -->

Maven

Update io.spinnaker.clouddriver:clouddriver-artifacts to 2025.4.1 or later

<!-- Update pom.xml dependency version to 2025.4.1 for io.spinnaker.clouddriver:clouddriver-artifacts -->

Maven

Update io.spinnaker.clouddriver:clouddriver-artifacts to 2025.2.4 or later

<!-- Update pom.xml dependency version to 2025.2.4 for io.spinnaker.clouddriver:clouddriver-artifacts -->

Maven

Update io.spinnaker.orca:orca-core to 2025.2.4 or later

<!-- Update pom.xml dependency version to 2025.2.4 for io.spinnaker.orca:orca-core -->

Maven

Update io.spinnaker.orca:orca-core to 2025.4.1 or later

<!-- Update pom.xml dependency version to 2025.4.1 for io.spinnaker.orca:orca-core -->

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (6)

Affects 1 ecosystem: maven (2).

Package	Ecosystem	Affected	Fixed In
io.spinnaker.orca:orca-core	maven	2025.3-0, 2025.3-1, 2025.3-10, 2025.3-11 (+10 more)	2025.3.1
io.spinnaker.clouddriver:clouddriver-artifacts	maven	2025.3-0, 2025.3-1, 2025.3-10, 2025.3-11 (+10 more)	2025.3.1
io.spinnaker.clouddriver:clouddriver-artifacts	maven	2025.4-0, 2025.4-1, 2025.4-10, 2025.4-11 (+19 more)	2025.4.1
io.spinnaker.clouddriver:clouddriver-artifacts	maven	2025.1.6, 2025.2-0, 2025.2-1, 2025.2-10 (+18 more)	2025.2.4
io.spinnaker.orca:orca-core	maven	2025.1.6, 2025.2-0, 2025.2-1, 2025.2-10 (+18 more)	2025.2.4
io.spinnaker.orca:orca-core	maven	2025.4-0, 2025.4-1, 2025.4-10, 2025.4-11 (+19 more)	2025.4.1

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-918
Server-Side Request Forgery (SSRF)MITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 9.1 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

Low

Availability

Low

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

References

Frequently Asked Questions

What is CVE-2026-25534?: Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames This vulnerability has been assigned a severity rating of CRITICAL (CVSS score: 9.1/10).
How do I check if my project is affected by CVE-2026-25534?: CVE-2026-25534 affects io.spinnaker.orca:orca-core and io.spinnaker.clouddriver:clouddriver-artifacts. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2026-25534 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

9.1

Exploitation is straightforward and causes maximum impact. Patch immediately.

Also Known As

GHSA-8r8j-gfhg-fw38

Related CVEs

CVE-2026-107726
CRITICAL
Hazelcast allows arbitrary member memory access by low-privileged client
CVE-2026-107282
CRITICAL
AsyncHttpClient: Replay to a different host sends the original host request and credentials to the new host
CVE-2026-32604
CRITICAL
Spinnaker: RCE when using gitrepo artifact types due to improper sanitization of user input on branch and paths
CVE-2026-44795
HIGH
Spinnaker has non-safe yaml deserialization, allowing RCE when using specific types

More Maven advisories

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies