CVE-2026-5598

UNKNOWN 0.0

Non-constant time comparisons risk private key leakage in FrodoKEM.

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

6th

Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). This vulnerability is associated with program files FrodoEngine.Java. This issue affects BC-JAVA: from 1.71 before 1.80.2, from 1.81 before 1.80.1, from 1.82 before 1.84.

CWE	CWE-385
Vendor	legion of the bouncy castle inc.
Product	bc-java
Published	Apr 15, 2026
Last Updated	May 18, 2026

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Affected Versions

Legion of the Bouncy Castle Inc. / BC-JAVA

1.71 < 1.80.2 1.81 < 1.80.1 1.82 < 1.84

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598 github.com: https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87 github.com: https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5

Credits

Cristina Dueñas Navarro ([email protected]) Sunwoo Lee and Seunghyun Yoon, Korea Institute of Energy Technology (KENTECH)