CVE-2026-5598 Security Details

CVE ID

CVE-2026-5598

CWE

CWE-385

CVE Description

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.

Published

Apr 20, 2026

CVSS Score & Severity

8.2High

CVSS Vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

EPSS Score

0.022%

Malware

malware

KEV Status

Not in KEV Catalog: No known exploits

Vulnerable Methods

org/bouncycastle/pqc/crypto/frodo/FrodoEngine.sample(S)S

JVM

Affected Ecosystems

affected

Source

National Vulnerability Database

References

GitHub · bcgit/bc-javaPROJECT

Red Hat · Security advisoryTHIRD_PARTY