CVE-2026-5598

Severity CVSS v4.0:

HIGH

Type:

Unavailable / Other

Publication date:

15/04/2026

Last modified:

21/04/2026

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.<br /> <br /> This issue affects BC-JAVA: from 1.71 before 1.84.

Impact

Vector 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 CVSS v4.0 Severity and Metrics:

Base Score: 8.90 HIGH
Vector: 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

Attack Vector (AV): Network
Attack Complexity (AC): Low
Attack Requirements (AT): None
Privileges Required (PR): None
User Interaction (UI): None
Confidentiality (VC): High
Integrity (VI): High
Availability (VA): None
Confidentiality (SC): High
Integrity (SI): High
Availability (SA): None
Safety (S): Present
Automatable (AU): Yes
Provider Urgency (U): Red
Exploit Maturity (E): Unreported

Base Score 4.0

8.90

Severity 4.0

HIGH

CVE-2026-5598

Description

Impact

References to Advisories, Solutions, and Tools