{"affected":[{"defaultStatus":"unaffected","ecosystem":"pypi","packageName":"scapy","product":"scapy","source":"CNA: VulnCheck","vendor":"secdev","versions":[{"lessThan":"2.8.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"2.8.0","versionType":"semver"}]}],"cveId":"CVE-2026-128238","cwes":["CWE-674"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.9,"severity":"medium","source":"CNA: VulnCheck","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","version":"4.0"},{"score":5.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},{"score":6.9,"severity":"medium","source":"NVD: disclosure@vulncheck.com","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":5.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1794565091520,"publishedAt":1794562428401,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/secdev/scapy/security/advisories/GHSA-456h-w4v7-hvpr"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/scapy-before-2.8.0-uncontrolled-recursion-dos-via-ber-sequence-decoder"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/secdev/scapy/security/advisories/GHSA-456h-w4v7-hvpr"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/scapy-before-2.8.0-uncontrolled-recursion-dos-via-ber-sequence-decoder"}],"remediation":[],"revision":"64dae0d3f9679411020f8283bc7a6c656e5e8a5c96538767c7018a171df37710","sources":[{"modifiedAt":1794562428401,"name":"CNA: VulnCheck","retrievedAt":1794564850513,"url":"https://www.cve.org/CVERecord?id=CVE-2026-128238"},{"modifiedAt":1794565091520,"name":"NVD","retrievedAt":1794572255896,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-128238"}],"ssvc":null,"status":"published","title":"Scapy before 2.8.0 Uncontrolled Recursion DoS via BER SEQUENCE Decoder","updatedAt":1794572255896}