CVE-2026-44378CWE-407

Botan: Quadratic complexity decoding BER indefinite length encodings

Medium · published May 27, 2026

CVSS v4.0
6.9
EPSS
0%
Percentile
38.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
6.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N
EPSS
0.00460 · 38.9th percentile
Weakness
CWE-407 · Inefficient Algorithmic Complexity
Published
2026-05-27T16:34Z
EPSS history
Timeline
  • 27 MAY 16:34Z
    Botan: Quadratic complexity decoding BER indefinite length encodings
    cvelistv5