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  4. CVE 2026 128237 scapy before 280 denial of service via quadratic
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Back to active CVEs
Medium · CVSS 6.9CVE-2026-128237

Scapy before 2.8.0 Denial of Service via Quadratic BER OID DecodingCVE-2026-128237

Answer in brief

CVE-2026-128237 records a Medium severity (CVSS 6.9) vulnerability in Scapy before 2.8.0 Denial of Service via Quadratic BER OID Decoding. The current sources do not mark it as known exploited. The current feed maps secdev/scapy (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 13, 2026Updated Nov 13, 2026Source checked Nov 13, 2026First seen by HOL Nov 13, 2026Material review Nov 13, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 6.9
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 6.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps secdev/scapy (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
secdev/scapygeneric>=0 <2.8.02.8.0

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for secdev/scapy.
  2. 2Review the reported fix. Update secdev/scapy to 2.8.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Nov 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 13, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 13, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • Source referencevulncheck.com
Upstream source 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+.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Scapy before 2.7.0 Insecure Deserialization RCE via Session FilesSame secdev/scapy package

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-407
Source
CVE List V5
Source checked
Nov 13, 2026
References
2 linked sources
Open source record