CVE-2026-5598
Non-constant time comparisons risk private key leakage in FrodoKEM.
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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 1.81.1, 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 | Jul 15, 2026 |
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Affected Versions
Legion of the Bouncy Castle Inc. / BC-JAVA
1.71 < 1.80.2 1.81 < 1.81.1 1.82 < 1.84
References
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 access.redhat.com: https://access.redhat.com/security/cve/CVE-2026-5598 bugzilla.redhat.com: https://bugzilla.redhat.com/show_bug.cgi?id=2458635 security.access.redhat.com: https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json access.redhat.com: https://access.redhat.com/errata/RHSA-2026:12267 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:18054 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:18055 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:12269 access.redhat.com: https://access.redhat.com/errata/RHSA-2026:18059
Credits
Cristina Dueñas Navarro ([email protected]) Sunwoo Lee and Seunghyun Yoon, Korea Institute of Energy Technology (KENTECH)