Improper Validation of Integrity Check Value Affecting org.bouncycastle:bcpg-jdk18on package, versions [1.74,1.86)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JAVA-ORGBOUNCYCASTLE-20536959
- published6 Oct 2026
- disclosed3 Oct 2026
- creditArpan Sharma
Introduced: 3 Oct 2026
NewCVE-2026-85515 (opens in a new tab)How to fix?
Upgrade org.bouncycastle:bcpg-jdk18on to version 1.86 or higher.
Overview
Affected versions of this package are vulnerable to Improper Validation of Integrity Check Value in the org.bouncycastle.openpgp.api streaming decryption path and the AEAD decryption streams. An attacker can cause decrypted plaintext to be accepted without an error, or have following packets silently dropped, by supplying a message truncated at an AEAD chunk boundary or a truncated SEIPDv1 message that reaches the high-level OpenPGP API. In the AEAD path, BcAEADUtil and JceAEADUtil read an EOFException as a clean end of message through BCPGInputStream.nextPacketTag(), so the caller receives authenticated chunk plaintext with no truncation failure reported. In the SEIPDv1 path, OpenPGPMessageInputStream.close() does not ensure the integrity-protected stream is closed, so the MDC verification in IntegrityProtectedInputStream never runs and the recipient gets CFB-decrypted plaintext with no integrity check.