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CVE-2026-25534

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

9.1 CriticalFix available

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.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
Low
User interaction
None

What an attacker can affect

Confidentiality
High
Integrity
Low
Availability
Low

Exploit likelihood

0.26%Up 0.2 points since Mar 18, 2026
90%50%10%1%

What each source reports

CVE List Score used 9.1

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

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.

Record
CVE-2026-25534
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Weakness
CWE-918
Updated
2026-11-02
EUVDEUVD-2026-12592 9.1

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.

Record
EUVD-2026-12592
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Updated
2026-11-02
GitHub AdvisoriesGHSA-8r8j-gfhg-fw38 9.1

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

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.

Record
GHSA-8r8j-gfhg-fw38
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Weakness
CWE-918
Updated
2026-11-02
NVD 9.1

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.

Record
CVE-2026-25534
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Weakness
CWE-918
Updated
2026-11-02
OSV 9.1

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

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.

Record
CVE-2026-25534
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Weakness
CWE-918
Updated
2026-11-02
OSVGHSA-8r8j-gfhg-fw38 9.1

Spinnaker clouddriver and orca URL validation bypass via underscores in hostnames

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.

Record
GHSA-8r8j-gfhg-fw38
CVSS 3.1
9.1 CriticalCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
Weakness
CWE-918
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
io.spinnaker.clouddriver:clouddriver-artifacts
Maven
 2025.3.0 up to 2025.3.1
2025.3.1
io.spinnaker.clouddriver:clouddriver-artifacts
Maven
 2025.4.0 up to 2025.4.1
2025.4.1
io.spinnaker.orca:orca-core
Maven
 2025.3.0 up to 2025.3.1
2025.3.1
io.spinnaker.orca:orca-core
Maven
 2025.4.0 up to 2025.4.1
2025.4.1
io.spinnaker.clouddriver:clouddriver-artifacts
Maven
 2025.1.6 up to 2025.2.4
2025.2.4
io.spinnaker.orca:orca-core
Maven
 2025.1.6 up to 2025.2.4
2025.2.4
io.spinnaker.clouddriver:clouddriver-artifacts
Maven
 2025.1.6 up to 2025.2.4, plus listed versions
2025.2-02025.2-12025.2-102025.2-112025.2-12
Show 16 moreShow less
2025.2-132025.2-142025.2-152025.2-162025.2-22025.2-32025.2-42025.2-52025.2-62025.2-72025.2-82025.2-92025.2.02025.2.12025.2.22025.2.3
2025.2.4
io.spinnaker.clouddriver:clouddriver-artifacts
Maven
 2025.3.0 up to 2025.3.1, plus listed versions
2025.3-02025.3-12025.3-102025.3-112025.3-12
Show 8 moreShow less
2025.3-22025.3-32025.3-42025.3-52025.3-62025.3-72025.3-82025.3-9
2025.3.1
io.spinnaker.clouddriver:clouddriver-artifacts
Maven
 2025.4.0 up to 2025.4.1, plus listed versions
2025.4-02025.4-12025.4-102025.4-112025.4-12
Show 17 moreShow less
2025.4-132025.4-142025.4-152025.4-162025.4-172025.4-182025.4-192025.4-22025.4-202025.4-212025.4-32025.4-42025.4-52025.4-62025.4-72025.4-82025.4-9
2025.4.1
io.spinnaker.orca:orca-core
Maven
 2025.1.6 up to 2025.2.4, plus listed versions
2025.2-02025.2-12025.2-102025.2-112025.2-12
Show 16 moreShow less
2025.2-132025.2-142025.2-152025.2-162025.2-22025.2-32025.2-42025.2-52025.2-62025.2-72025.2-82025.2-92025.2.02025.2.12025.2.22025.2.3
2025.2.4
io.spinnaker.orca:orca-core
Maven
 2025.3.0 up to 2025.3.1, plus listed versions
2025.3-02025.3-12025.3-102025.3-112025.3-12
Show 8 moreShow less
2025.3-22025.3-32025.3-42025.3-52025.3-62025.3-72025.3-82025.3-9
2025.3.1
io.spinnaker.orca:orca-core
Maven
 2025.4.0 up to 2025.4.1, plus listed versions
2025.4-02025.4-12025.4-102025.4-112025.4-12
Show 17 moreShow less
2025.4-132025.4-142025.4-152025.4-162025.4-172025.4-182025.4-192025.4-22025.4-202025.4-212025.4-32025.4-42025.4-52025.4-62025.4-72025.4-82025.4-9
2025.4.1

History

History
RecordedChangedSources
first indexedCVE List, EUVD, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-25534 is a critical vulnerability (CVSS 9.1) in Io.spinnaker.clouddriver Clouddriver-artifacts, published March 16, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.26%, the 18th percentile. Fixed in io.spinnaker.clouddriver:clouddriver-artifacts 2025.3.1.

References

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