Covert Timing Channel in The Bouncy Castle Crypto Package For Java - CVE-2026-5598
Published: May 25, 2026
Vulnerability identifier: #VU132259
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-5598
CWE-ID: CWE-385
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Legion of the Bouncy Castle Inc.
Affected software:
The Bouncy Castle Crypto Package For Java
The Bouncy Castle Crypto Package For Java
Detailed vulnerability description
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to a covert timing channel in FrodoEngine.java in the BC-JAVA core modules when performing cryptographic operations. A remote attacker can measure timing differences to disclose sensitive information.
How to mitigate CVE-2026-5598
Install security update from vendor's website.