CVE-2026-5588 — Use of a Broken or Risky Cryptographic Algorithm in OF THE Bouncy Castle INC Bc-java

CWE-327 — Use of a Broken or Risky Cryptographic Algorithm4 documents4 sources
Severity
6.3MEDIUMNVD
EPSS
0.0%
top 98.28%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
1
Legion OF THE Bouncy Castle INC Bc-java
Timeline
PublishedApr 15

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.

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

Affected Packages1 packages

🔴Vulnerability Details

3
VulDB
Legion of the Bouncy Castle BC-JAVA up to 1.83 risky encryption↗2026-04-15
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GHSA
GHSA-wg6q-6289-32hp: : Use of a Broken or Risky Cryptographic Algorithm vulnerability in Legion of the Bouncy Castle Inc↗2026-04-15
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GHSA
Bouncy Castle Crypto Package For Java: Use of a Broken or Risky Cryptographic Algorithm vulnerability in bcpkix modules↗2026-04-15
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