AIKIDO-2026-322957
bcprov-jdk18on is vulnerable to Signature Verification Bypass
45
Medium Risk
This Affects:
bcprov-jdk18onTL;DR
BLS12-381 public-key validation accepts a point on a foreign curve that shares the field characteristic, so a phantom signer can appear in an aggregate signature. The fix requires the exact canonical BLS12-381 G1 curve before the subgroup and order check.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and you directly construct BLS public-key points on explicit curves and rely on aggregate-signature participant validation.
Background info
bcprov-jdk18on is vulnerable to Signature Verification Bypass in versions 1.85 - 1.85.2.
How to fix this
Upgrade the bcprov-jdk18on library to the patch version.
Are You Affected?
Connect your repositories to instantly see whether vulnerable or malicious packages exist in your codebase.
Free. No credit card required.
I consent to receiving marketing communications based on Aikido’s Privacy Policy.
SOC 2Compliant
ISO 27001CompliantISO 42001Compliant
FedRAMPImplementing© All Intel data is openly available and commercially licensed.