GitHub Advisoryadvisory · Maven

GHSA-wg6q-6289-32hp Bouncy Castle Crypto Package For Java: Use of a Broken or Risky Cryptographic Algorithm vulnerability in bcpkix modules

MEDIUM Published 2026-04-15 Modified 2026-04-16 Official page ↗
Aliases
CVE-2026-5588
Ecosystem
Maven
Packages
org.bouncycastle:bcpkix-jdk18on, org.bouncycastle:bcpkix-jdk15to18, org.bouncycastle:bcpkix-jdk15on, org.bouncycastle:bcpkix-jdk14, org.bouncycastle:bcpkix-debug-jdk18on, org.bouncycastle:bcpkix-debug-jdk15to18, org.bouncycastle:bcpkix-debug-jdk14
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/U:Green
Weaknesses
CWE-327
Reviewed
2026-04-16

Affected packages

• Maven org.bouncycastle:bcpkix-jdk18on: >= 1.49, < 1.84 → fixed in 1.84 • Maven org.bouncycastle:bcpkix-jdk15to18: >= 1.49, < 1.84 → fixed in 1.84 • Maven org.bouncycastle:bcpkix-jdk15on: >= 1.49, < 1.84 → fixed in 1.84 • Maven org.bouncycastle:bcpkix-jdk14: >= 1.49, < 1.84 → fixed in 1.84 • Maven org.bouncycastle:bcpkix-debug-jdk18on: >= 1.49, < 1.84 → fixed in 1.84 • Maven org.bouncycastle:bcpkix-debug-jdk15to18: >= 1.49, < 1.84 → fixed in 1.84 • Maven org.bouncycastle:bcpkix-debug-jdk14: >= 1.49, < 1.84 → fixed in 1.84

Description

: Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules). PKIX draft CompositeVerifier accepts empty signature sequence as valid. This issue affects BC-JAVA: from 1.49 before 1.84.

Related

Alias · CVE (1)

  • CVE-2026-5588 Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. vulnerability

Weakness · CWE (1)

  • CWE-327 Use of a Broken or Risky Cryptographic Algorithm weakness

References