Scapy before 2.8.0 contains an uncontrolled recursion vulnerability in the BER/ASN.1 decoder in scapy/asn1/ber.py that allows unauthenticated remote attackers to crash parsing applications. Attackers can send a single 833-byte packet with 250 nested ASN.1 SEQUENCE structures to trigger an unhandled RecursionError, terminating TLS, SNMP, X.509, or LDAP parsers even with safe=True.
Advisories
No advisories yet.
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Fri, 13 Nov 2026 09:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | Scapy before 2.8.0 contains an uncontrolled recursion vulnerability in the BER/ASN.1 decoder in scapy/asn1/ber.py that allows unauthenticated remote attackers to crash parsing applications. Attackers can send a single 833-byte packet with 250 nested ASN.1 SEQUENCE structures to trigger an unhandled RecursionError, terminating TLS, SNMP, X.509, or LDAP parsers even with safe=True. | |
| Title | Scapy before 2.8.0 Uncontrolled Recursion DoS via BER SEQUENCE Decoder | |
| First Time appeared |
Scapy
Scapy scapy |
|
| Weaknesses | CWE-674 | |
| CPEs | cpe:2.3:a:scapy:scapy:*:*:*:*:*:*:*:* | |
| Vendors & Products |
Scapy
Scapy scapy |
|
| References |
| |
| Metrics |
cvssV3_1
|
Projects
Sign in to view the affected projects.
Status: PUBLISHED
Assigner: VulnCheck
Published:
Updated: 2026-11-13T22:31:14.151Z
Reserved: 2026-11-12T23:11:45.421Z
Link: CVE-2026-128238
No data.
Status : Awaiting Analysis
Published: 2026-11-13T10:18:11.520
Modified: 2026-11-13T15:54:09.263
Link: CVE-2026-128238
No data.
OpenCVE Enrichment
No data.
Weaknesses