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Advisory details: vulnrichment / CVE-2026-5598
Advisory ID vulnrichment/CVE-2026-5598
Aliases
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.
Status Published
Exploitability 0.5
Weighted Severity 0.0
Risk
Affected and Fixed Packages Package Details
Introduced and Fixed Package Commit Patches Package Commit Patches Details
Weaknesses (1)
CWE-385 Covert Timing Channel
System Score Found at
cvssv3.1 7.5
cvssv4 8.9
ssvc Track
Reference id Reference type URL
8692e6b2b191fc4aafa32545c7a78bdb9bf110c5 Other https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5
94abbd56413dfdac651fd878bc60253871ef5e87 Other https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87
CVE%E2%80%902026%E2%80%905598 Advisory https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598
No exploits are available.

No EPSS data available for this advisory.

Patch URL
There are no known patches.
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Found at None
Attack Vector (AV) Attack Complexity (AC) Privileges Required (PR) User Interaction (UI) Scope (S) Confidentiality Impact (C) Integrity Impact (I) Availability Impact (A)

network

adjacent_network

local

physical

low

high

none

low

high

none

required

unchanged

changed

high

low

none

high

low

none

high

low

none
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 Found at None
Attack Vector (AV) Attack Complexity (AC) Attack Requirements (AT) Privileges Required (PR) User Interaction (UI) Vulnerable System Impact Confidentiality (VC) Vulnerable System Impact Integrity (VI) Vulnerable System Impact Availability (VA) Subsequent System Impact Confidentiality (SC) Subsequent System Impact Integrity (SI) Subsequent System Impact Availability (SA)

network

adjacent

local

physical

low

high

none

present

none

low

high

none

passive

active

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none

high

low

none
Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-04-15T13:11:48Z/ Found at None

Vector: SSVCv2/E:N/A:Y/T:T/P:M/B:A/M:M/D:T/2026-04-15T13:11:48Z/

Decision: Track

Source URL: https://github.com/cisagov/vulnrichment/blob/develop/2026/5xxx/CVE-2026-5598.json

Source Advisory: vulnrichment/CVE-2026-5598

View SSVC decision tree 
[{'Exploitation': 'none'},
 {'Automatable': 'yes'},
 {'Technical Impact': 'total'},
 {'Mission Prevalence': 'minimal'},
 {'Public Well-being Impact': 'material'},
 {'Mission & Well-being': 'medium'}]