AIKIDO-2026-89900
bcpkix-jdk18on is vulnerable to Improper Verification of Cryptographic Signature
87
High Risk
This Affects:
bcpkix-jdk18onTL;DR
The CMSSignedData verification logic treats a SignedData structure that contains no signers as successfully verified. Code that relies on signature verification to confirm authenticity accepts content that carries zero signatures. Before the fix, unsigned or signer-stripped messages can be mistaken for validly signed data. The fix rejects SignedData that contains no signer information.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you rely on CMS SignedData signature verification to authenticate externally supplied messages.
Background info
bcpkix-jdk18on is vulnerable to Improper Verification of Cryptographic Signature in versions 0.0.1 - 1.84.0.
How to fix this
Upgrade the org.bouncycastle:bcpkix-jdk18on library to the patch version.
Links
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