CVE-2026-5598

Summary

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.

Affected Software

Weaknesses

• CWE-385: CWE-385 Covert timing channel

ADP Enrichment

CISA ADP Vulnrichment

• SSVC:
• Exploitation: none
  • Automatable: yes
  • Technical Impact: total

bouncycastle: BC-JAVA: private key leakage via non-constant time comparisons

Additional References

• https://access.redhat.com/security/cve/CVE-2026-5598
• https://bugzilla.redhat.com/show_bug.cgi?id=2458635
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-5598.json
• https://access.redhat.com/errata/RHSA-2026:12267
• https://access.redhat.com/errata/RHSA-2026:18054
• https://access.redhat.com/errata/RHSA-2026:18055
• https://access.redhat.com/errata/RHSA-2026:12269
• https://access.redhat.com/errata/RHSA-2026:18059

References

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

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