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CVE-2026-59638

JSSE hostname verifier CN-fallback enabled by default despite documented opt-in PUBLISHED

Description (CNA)

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).

Affected (CNA)

Vendor / productVersions
Legion of the Bouncy Castle Inc. / BC-JAVAaffected 1.61 before 1.85
Legion of the Bouncy Castle Inc. / BC-LTS-JAVAaffected 2.73.0 before 2.73.12
Legion of the Bouncy Castle Inc. / BC-FJAaffected 1.0.7 before 1.0.24; affected 2.0.0 before 2.0.24; affected 2.1.0 before 2.1.24

CWE

CWE-297

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.