Vulnerability in Botan Project
CVE-2026-44378
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.
EPSS: 0.003 (25.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Botan_project Botan
- Randombit Botan — versions < 3.12.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-44378?
- CVE-2026-44378 is a high-severity vulnerability in Botan Project, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2026-05-27.
- How severe is CVE-2026-44378?
- High severity. CVSS v3 base score is 7.5 out of 10.