What’s Vulnerable › Vulnerabilities
CVE-2026-44378: Botan: Quadratic complexity decoding BER indefinite length encodings
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.3% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-27 · updated 2026-10-26
- Weakness: CWE-407
Description
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
- randombit botan: before 3.12.0 — fixed in 3.12.0
How to fix
Upgrade to a fixed version: randombit botan 3.12.0. Check the vendor advisory for mitigations.
References
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