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Advisory details: gitlab / maven/org.bouncycastle/bcprov-jdk14/CVE-2026-5598
Advisory ID gitlab/maven/org.bouncycastle/bcprov-jdk14/CVE-2026-5598
Aliases CVE-2026-5598
GHSA-p93r-85wp-75v3
Summary Bouncy Castle Has Covert Timing Channel Vulnerability 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 only affects users of the FrodoKEM algorithm involved in the decryption of encapsulations. This issue affects BC-JAVA: from 1.71 to 1.80.1, 1.81, 1.82 to 1.83. Fixed versions: 1.80.2, 1.81.1, 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 (3)
CWE-385 Covert Timing Channel
CWE-937 OWASP Top Ten 2013 Category A9 - Using Components with Known Vulnerabilities
CWE-1035 OWASP Top Ten 2017 Category A9 - Using Components with Known Vulnerabilities
System Score Found at
cvssv3.1 https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.bouncycastle/bcprov-jdk14/CVE-2026-5598.yml
Reference id Reference type URL
https://github.com/bcgit/bc-java/wiki/CVE-2026-5598
8692e6b2b191fc4aafa32545c7a78bdb9bf110c5 Other https://github.com/bcgit/bc-java/commit/8692e6b2b191fc4aafa32545c7a78bdb9bf110c5
94abbd56413dfdac651fd878bc60253871ef5e87 Other https://github.com/bcgit/bc-java/commit/94abbd56413dfdac651fd878bc60253871ef5e87
CVE-2026-5598 https://nvd.nist.gov/vuln/detail/CVE-2026-5598
CVE%E2%80%902026%E2%80%905598 Advisory https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905598
GHSA-p93r-85wp-75v3 https://github.com/advisories/GHSA-p93r-85wp-75v3
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:C/C:H/I:H/A:N Found at https://gitlab.com/gitlab-org/advisories-community/-/blob/main/maven/org.bouncycastle/bcprov-jdk14/CVE-2026-5598.yml
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: 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'}]