CVE-2026-5588
EPSS 0.01%Bouncy Castle Crypto Package For Java: Use of a Broken or Risky Cryptographic Algorithm vulnerability in bcpkix modules
Published: 4/15/2026Modified: 5/19/2026
Description
Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA bcpkix on all (pkix modules), Legion of the Bouncy Castle Inc. BCPKIX-FIPS bcpkix on All (pkix modules), Legion of the Bouncy Castle Inc. BCPIX-LTS bcpkix on All (pkix modules). This vulnerability is associated with program files JcaContentVerifierProviderBuilder.Java, JcaContentVerfierProviderBuilder.Java. This issue affects BC-JAVA: from 1.67 before 1.80.2, from 1.81 before 1.81.1, from 1.82 before 1.84; BCPKIX-FIPS: from 2.0.6 before 2.0.11, from 2.1.7 before 2.1.11; BCPIX-LTS: from 2.73.7 before 2.73.11.
Affected packages (8)
- Debian/bouncycastlefrom 0
- Maven/org.bouncycastle:bcpkix-debug-jdk14>= 1.49, < 1.84
- Maven/org.bouncycastle:bcpkix-debug-jdk15to18>= 1.49, < 1.84
- Maven/org.bouncycastle:bcpkix-debug-jdk18on>= 1.49, < 1.84
- Maven/org.bouncycastle:bcpkix-jdk14>= 1.49, < 1.84
- Maven/org.bouncycastle:bcpkix-jdk15on>= 1.49, < 1.84
- Maven/org.bouncycastle:bcpkix-jdk15to18>= 1.49, < 1.84
- Maven/org.bouncycastle:bcpkix-jdk18on>= 1.49, < 1.84
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | 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 |
References (5)
- ADVISORYhttps://nvd.nist.gov/vuln/detail/CVE-2026-5588
- ADVISORYhttps://security-tracker.debian.org/tracker/CVE-2026-5588
- PATCHhttps://github.com/bcgit/bc-java
- WEBhttps://github.com/bcgit/bc-java/commit/656bae0dbd9b1521f840521ff786e78749fe3057
- WEBhttps://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905588