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CVE-2026-59646

DTLS handshake reassembler allocates buffer from unchecked 24-bit length

In Bouncy Castle for Java before 1.85, DTLS handshake reassembler allocates buffer from unchecked 24-bit length. 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).

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Bouncycastle Legion Of The Bouncy Castle Inc.
Products
Bc-java Bctls-fips Bouncy Castle For Java Lts and 3 more
CVE-2026-59638

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

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).

CVSS 4.0 · 9.3 Critical EPSS < 1% KEV · Not listed
Vendors
Bouncycastle Legion Of The Bouncy Castle Inc.
Products
Bc-java Bctls-fips Bouncy Castle For Java Lts and 3 more
CVE-2026-14682

Possible OOM from unbounded up-front allocation on a definite-length read

In Bouncy Castle for Java before 1.85, Possible OOM from unbounded up-front allocation on a definite-length read. This issue also affects Bouncy Castle for Java LTS before 2.73.12, and Bouncy Castle for Java FIPS (BC-FJA) before bc-fips 1.0.2.7 (1.0.X series), 2.0.2 (2.0.X series) and 2.1.3 (2.1.X series), and before bctls-fips 1.0.24.

CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Bouncycastle Legion Of The Bouncy Castle Inc.
Products
Bc-java Bctls-fips Bouncy Castle For Java Lts and 4 more