CVE-2026-59646

UNKNOWN 0.0

DTLS handshake reassembler allocates buffer from unchecked 24-bit length

CVSS Score

0.0

EPSS Score

0.0%

EPSS Percentile

0th

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).

CWE	CWE-789
Vendor	legion of the bouncy castle inc.
Product	bc-java
Published	Aug 3, 2026

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Affected Versions

Legion of the Bouncy Castle Inc. / BC-JAVA

0 < 1.85

Legion of the Bouncy Castle Inc. / BC-LTS-JAVA

2.73.0 < 2.73.12

Legion of the Bouncy Castle Inc. / BC-FJA

1.0.0 < 1.0.24 2.0.0 < 2.0.24 2.1.0 < 2.1.24

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/bcgit/bc-java/wiki/CVE-2026-59646 github.com: https://github.com/bcgit/bc-java/commit/2ea38942c7917f6d7ab4de93d8a5336d021df0d9 github.com: https://github.com/bcgit/bc-java/commit/2d98721e71bbd822ffa0f84e088eea645cf679fa

Credits

🔍 Alex Gaynor in collaboration with Claude and Anthropic Research