CVE-2026-44378: Botan Project Botan

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

Botan is a C++ cryptography library. Prior to 3.12.0, certain patterns of indefinite length encodings in BER data could cause quadratic behavior in the parser, resulting in a denial of service. Such BER encodings were accepted even in structures which are required to be encoded as DER, which prohibits indefinite length encodings. This vulnerability is fixed in 3.12.0.

Affected products

• Botan Project Botan: before 3.12.0 (fixed in 3.12.0)

Published 2026-05-27. Last modified 2026-06-17.