> CVE-2026-5598 [CRITICAL]

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PUBLISHED
2026-04-15 10:16
MODIFIED
2026-04-15 10:16
CVSS_SCORE V3
10.0
EPSS (Prob. Exploit)
0.96%
Top 38.8%
DATA SOURCES:
NVD 🔗 2026-04-15 RED HAT 🔗 2026-04-19 CWE MITRE 🔗 2026-11-01 FIRST EPSS 🔗 2026-10-25 GITHUB 🔗 2026-11-05

> DESCRIPTION

Covert timing channel vulnerability in Legion of the Bouncy Castle Inc. BC-JAVA core on all (core modules). Non-constant time comparisons risk private key leakage in FrodoKEM. This issue affects BC-JAVA: from 2.17.3 before 1.84.

> AFFECTED_PRODUCTS

ℹ️ Aucun produit affecté n'a encore été publié par NVD pour cette CVE.

> CVSS V3 METRICS

CVSS_VECTOR
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

> MÉTRIQUES CVSS DÉTAILLÉES

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Métrique Valeur Interprétation
AV (Vecteur d'Attaque)
Attack Vector
Network (N)
Exploit possible à distance via réseau (HTTP, API, etc.)
AC (Complexité d'Attaque)
Attack Complexity
Low (L)
Peu de conditions requises pour exploiter
PR (Privilèges Requis)
Privileges Required
None (N)
Aucune authentification requise
UI (Interaction Utilisateur)
User Interaction
None (N)
Aucune interaction utilisateur nécessaire
S (Périmètre)
Scope
Unchanged (U)
Impact reste dans le périmètre du composant compromis
C (Impact Confidentialité)
Confidentiality Impact
High (H)
Divulgation totale d'informations
I (Impact Intégrité)
Integrity Impact
High (H)
Modification totale des données possible
A (Impact Disponibilité)
Availability Impact
High (H)
Interruption totale du service possible

> RÉSUMÉ DES IMPACTS

Confidentialité
High
Divulgation totale d'informations
Intégrité
High
Modification totale des données possible
Disponibilité
High
Interruption totale du service possible

> WEAKNESSES

CWE-385

> CWE DETAILED DESCRIPTIONS

CWE-385: Covert Timing Channel - Covert timing channels convey information by modulating some aspect of system behavior over time, so that the program receiving the information can observe system behavior and infer protected information.

> RED HAT SECURITY ADVISORIES

Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.24 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 7.4. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.24 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 7.4. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabili...
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.6 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1 for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of I...
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.6 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1 for Red Hat Enterprise Linux 9. Red Hat Product Security has rated this update as having a security impact of I...
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 8.1.6 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 8.1 for Red Hat Enterprise Linux 8. Red Hat Product Security has rated this update as having a security impact of I...
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 security update
A security update is now available for Red Hat JBoss Enterprise Application Platform 7.4. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerabilit...
Red Hat Security Advisory: Red Hat JBoss Enterprise Application Platform 7.4.25 security pdate
A security update is now available for Red Hat JBoss Enterprise Application Platform 7.4 for Red Hat Enterprise Linux 7. Red Hat Product Security has rated this update as having a security impact of I...

> RED HAT SEVERITY ASSESSMENT

THREAT SEVERITY
Important

> GITHUB SECURITY ADVISORY

GHSA-p93r-85wp-75v3 HIGH

Bouncy Castle Has Covert Timing Channel Vulnerability

AFFECTED PACKAGES:
MAVEN / org.bouncycastle:bcprov-jdk18on
>= 1.71, < 1.80.2
Fixed in: 1.80.2
MAVEN / org.bouncycastle:bcprov-jdk18on
>= 1.81, < 1.81.1
Fixed in: 1.84
MAVEN / org.bouncycastle:bcprov-jdk14
>= 1.71, < 1.84
Fixed in: 1.84
MAVEN / org.bouncycastle:bcprov-jdk18on
>= 1.82, < 1.84
Fixed in: 1.84
MAVEN / org.bouncycastle:bcprov-jdk15to18
>= 1.71, < 1.80.2
Fixed in: 1.80.2

> HISTORIQUE DES MODIFICATIONS

Première apparition
15/04/2026 10:16
Source: NVD
📊 ENRICHISSEMENT 01/05/2026 06:01
CWE
Champ modifié: Description CWE
Ancienne valeur:
N/A
Nouvelle valeur:
CWE-385: Covert Timing Channel - Covert timing channels convey information by modulating some aspect of system behavior over time, so that the program receiving the information can observe system beha...
📊 ENRICHISSEMENT 19/04/2026 05:01
REDHAT
Champ modifié: Sévérité Red Hat
Ancienne valeur:
N/A
Nouvelle valeur:
{ "threat_severity": "Important", "severity_scale": null }
📊 ENRICHISSEMENT 19/04/2026 05:01
REDHAT
Champ modifié: Red Hat
Ancienne valeur:
Non
Nouvelle valeur:
Oui
Total des modifications: 3 Dernière mise à jour: 6 months ago

> REFERENCES

https://github.com/bcgit/bc-java/wiki/CVE%E2%80%902026%E2%80%905998
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