CVE-2026-59638

MediumCVSS 6.5/10Last modified Aug 28, 2026

Description

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).

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-297

Affected software

No affected versions have been published.

Timeline

Published
Aug 3, 2026
Last modified
Aug 28, 2026
NVD status
Analyzed

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CVE-2026-59638: Medium severity, CVSS 6.5 | Vulnix