AIKIDO-2026-45740
bcprov-jdk15on is vulnerable to Improper Certificate Validation
85
High Risk
This Affects:
bcprov-jdk15onTL;DR
The legacy org.bouncycastle.x509.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.x509.PKIXCertPathReviewer as the trust decision for certificate paths constrained by permitted or excluded names.
Background info
bcprov-jdk15on is vulnerable to Improper Certificate Validation in versions 1.46 - 1.70.
How to fix this
Migrate the bcprov-jdk15on dependency to bcprov-jdk18on 1.86 or later, or to bcprov-jdk15to18 1.86 or later if you cannot move to Java 8, as the jdk15on coordinates receive no security fixes.
Links
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