CVE-2026-5588

EUVD-2026-22871
: 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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
UNKNOWN
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Awaiting analysis
This vulnerability is currently awaiting analysis.
Base Score
CVSS 3.x
EPSS Score
Percentile: Unknown
Common Weakness Enumeration
References
https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905588