AIKIDO-2026-695180
bcpkix-jdk18on is vulnerable to Improper Certificate Validation
85
High Risk
This Affects:
bcpkix-jdk18onTL;DR
org.bouncycastle.pkix.jcajce.PKIXCertPathReviewer skips X.509 name-constraint checks for the target certificate and can report a prohibited leaf certificate as valid. The fix applies name constraints at path index zero while preserving target-specific RFC behavior.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you use org.bouncycastle.pkix.jcajce.PKIXCertPathReviewer as the trust decision for certificate paths constrained by permitted or excluded names.
Background info
bcpkix-jdk18on is vulnerable to Improper Certificate Validation in versions 1.74 - 1.85.
How to fix this
Upgrade the bcpkix-jdk18on library to the patch version.
Are You Affected?
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