Inefficient Algorithmic Complexity in Botan - CVE-2026-44378
Published: May 7, 2026
Vulnerability identifier: #VU130440
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-44378
CWE-ID: CWE-407
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Randombit
Affected software:
Botan
Botan
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient algorithmic complexity in the BER parser when parsing indefinite length encodings in ASN.1 encoded data. A remote attacker can send specially crafted ASN.1 data to cause a denial of service.
This can be triggered with ASN.1 encoded inputs such as an X.509 certificate or OCSP response.
How to mitigate CVE-2026-44378
Install security update from vendor's website.