What is CVE-2026-44378?

CVE-2026-44378 is a high-severity vulnerability in Botan_project Botan, 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.

Vulnerability in Botan_project Botan

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 stru…

EPSS: 0.001 (17.5th 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)

CWE-407 — Inefficient Algorithmic Complexity

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 Botan, 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.