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).
Analysis
No analysis available yet.
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Legion of the Bouncy Castle Inc. | BC-JAVA | unaffected |
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| Legion of the Bouncy Castle Inc. | BC-LTS-JAVA | unaffected |
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| Legion of the Bouncy Castle Inc. | BC-FJA | unaffected |
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Remediation
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Tracking
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Advisories
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References
History
Mon, 03 Aug 2026 01:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| 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). | |
| Title | JSSE hostname verifier CN-fallback enabled by default despite documented opt-in | |
| Weaknesses | CWE-297 | |
| References |
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| Metrics |
cvssV4_0
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Subscriptions
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MITRE
Status: PUBLISHED
Assigner: bcorg
Published:
Updated: 2026-08-03T00:57:31.904Z
Reserved: 2026-07-06T06:58:29.263Z
Link: CVE-2026-59638
Vulnrichment
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NVD
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Redhat
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OpenCVE Enrichment
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Weaknesses
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CWE-297
Improper Validation of Certificate with Host Mismatch