Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in LeafNode.verify in org.bouncycastle.mls.codec, which never checks that the subject public key of the X.509 credential's end entity certificate matches the leaf's signaturekey field, although RFC 9420...

Improper Certificate Validation

Overview Affected versions of this package are vulnerable to Improper Certificate Validation in LeafNode.verify in org.bouncycastle.mls.codec, which never checks that the subject public key of the X.509 credential's end entity certificate matches the leaf's signaturekey field, although RFC 9420...

CVE-2026-71885

In Bouncy Castle for Java before 1.86, the Messaging Layer Security MLS, RFC 9420 implementation did not bind an X.509 credential to a LeafNode's signaturekey. LeafNode.verify checked a leaf's signature against the signaturekey carried in the leaf itself, while the credential's X.509 certificate...

CVE-2026-71885 MLS X.509 credential not bound to the LeafNode signature key

In Bouncy Castle for Java before 1.86, the Messaging Layer Security MLS, RFC 9420 implementation did not bind an X.509 credential to a LeafNode's signaturekey. LeafNode.verify checked a leaf's signature against the signaturekey carried in the leaf itself, while the credential's X.509 certificate...

Linux Distros Unpatched Vulnerability : CVE-2026-71885

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In Bouncy Castle for Java before 1.86, the Messaging Layer Security MLS, RFC 9420 implementation did not bind an X.509 credential to a LeafNode's signaturekey...