CVE-2026-5598
Bouncy Castle Has Covert Timing Channel Vulnerability
EPSS 0.02%
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 1.80.1, from 1.82 before 1.84.
How to fix CVE-2026-5598
To remediate CVE-2026-5598, upgrade the affected package to a fixed version below.
- Debian/bouncycastle—no fix listed
- Maven/org.bouncycastle:bcprov-jdk14—upgrade to 1.84 or later
- —upgrade to 1.84 or later
- —upgrade to 1.84 or later
Is CVE-2026-5598 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (4)
- from 0
- >= 1.71, < 1.84
- >= 1.71, < 1.84
- >= 1.71, < 1.84
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 4.0 | — | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N/E:U/S:P/AU:Y/U:Red |