CVE-2025-29778

Kyverno ignores subjectRegExp and IssuerRegExp

Description

Kyverno is a policy engine designed for cloud native platform engineering teams. Prior to version 1.14.0-alpha.1, Kyverno ignores subjectRegExp and IssuerRegExp while verifying artifact's sign with keyless mode. It allows the attacker to deploy kubernetes resources with the artifacts that were signed by unexpected certificate. Deploying these unauthorized kubernetes resources can lead to full compromise of kubernetes cluster. Version 1.14.0-alpha.1 contains a patch for the issue.

Category

5.8
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.03%
Affected: kyverno kyverno
Published at:
Updated at:

References

Link Tags
https://github.com/kyverno/kyverno/security/advisories/GHSA-46mp-8w32-6g94
https://github.com/kyverno/policies/issues/1246
https://github.com/kyverno/kyverno/pull/12237
https://github.com/kyverno/kyverno/commit/8777672fb17bdf252bd2e7d8de3441e240404a60
https://github.com/Mohdcode/kyverno/blob/373f942ea9fa8b63140d0eb0e101b9a5f71033f3/pkg/cosign/cosign.go#L537

Frequently Asked Questions

What is the severity of CVE-2025-29778?
CVE-2025-29778 has been scored as a medium severity vulnerability.
How to fix CVE-2025-29778?
To fix CVE-2025-29778, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-29778 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-29778 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-29778?
CVE-2025-29778 affects kyverno kyverno.
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