CVE-2026-59638 in Bouncy Castle for Java FIPS

Résumé

par MITRE • 03/08/2026

In Bouncy Castle for Java before 1.85, JSSE hostname verifier CN-fallback enabled by default despite documented opt-in. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bctls-fips 1.0.24 (1.0.X series), 2.0.24 (2.0.X series) and 2.1.24 (2.1.X series).

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• Responsable: Bcorg
• Réserver: 06/07/2026
• Divulgation: 03/08/2026
• Modérer: accepté
• Entrée: VDB-385429
• CPE: prêt
• CWE: CWE-284 (confirmé)
• CVSS: 7.3 (VulDB)
• EPSS: 0.00000
• KEV: non
• Activités: faible
• Secteur: Chemical, Telecommunication, ...

Sources

• MITRE: https://www.cve.org/CVERecord?id=CVE-2026-59638
• NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-59638
• CVE Details: https://www.cvedetails.com/cve/CVE-2026-59638/