AIKIDO-2026-431029
bcpg-jdk18on is vulnerable to Improper Verification of Cryptographic Signature
87
CVE Score
High
Improper Verification of Cryptographic Signature
TL;DR
Bouncy Castle's OpenPGP one-pass inline-signature processing silently ignores signature policy failures instead of surfacing them to the caller. A message whose inline signature does not satisfy the configured policy is still processed as if verification succeeded. This lets unsigned or improperly signed content be accepted as authentic. The fix propagates inline-signature policy failures so callers can reject the data.
How do I fix this?
Upgrade the org.bouncycastle:bcpg-jdk18on library to the patch version.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and your application relies on OpenPGP inline (one-pass) signature policy enforcement for externally supplied messages.
Package
Versions
1.81 - 1.84
Fixed in 1.85Background info
bcpg-jdk18on is vulnerable to Improper Verification of Cryptographic Signature in versions 1.81 - 1.84.
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