CVE-2026-128237
MEDIUM
NVD
CVSS Score
5.3
Severity
MEDIUM
Published
Nov 13, 2026
Vendor
unknown
Description
Scapy before 2.8.0 contains a denial of service vulnerability in BER_num_dec() and BERcodec_OID.do_dec() that allows remote attackers to exhaust CPU by supplying oversized OID arcs. Attackers can send ASN.1/BER data with many base-128 continuation bytes to cause quadratic CPU consumption or an uncaught ValueError crash on Python 3.11+.