{"affected":[{"defaultStatus":"unaffected","product":"ipfixcol2","source":"CNA: VulnCheck","vendor":"CESNET","versions":[{"lessThan":"2.9.0","status":"affected","version":"2.3.0","versionType":"semver"}]}],"cveId":"CVE-2026-122130","cwes":["CWE-190"],"description":"CESNET ipfixcol2 2.3.0 before 2.9.0 contains an integer overflow vulnerability in the Forwarder output plugin that allows unauthenticated IPFIX exporters to overflow a heap buffer by wrapping uint16_t message length counters. Attackers can send near-65535-byte data sets and large templates to a collector forwarding over TCP to crash it and perform 2-byte writes to attacker-influenced addresses.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":8.3,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N","version":"4.0"},{"score":8.2,"severity":"high","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","version":"3.1"}],"modifiedAt":1793824610335,"publishedAt":1793824610335,"references":[{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/CESNET/ipfixcol2/commit/ad206f6217257b06b139f1b2bce50d52f5bc6acb"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://github.com/CESNET/ipfixcol2"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/CESNET/ipfixcol2/releases/tag/v2.9.0"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/CESNET/ipfixcol2/blob/v2.8.0/src/plugins/output/forwarder/src/Message.cpp#L134-L156"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/cesnet-ipfixcol2-2.3.0-before-2.9.0-buffer-overflow-via-forwarder-output-plugin"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/CESNET/ipfixcol2/commit/ad206f6217257b06b139f1b2bce50d52f5bc6acb"}],"revision":"7262f994e48b8f83c07e67b6a5c1532182b6841e2ce4a0837f35d2a35e243ab6","sources":[{"modifiedAt":1793824610335,"name":"CNA: VulnCheck","retrievedAt":1793826723697,"url":"https://www.cve.org/CVERecord?id=CVE-2026-122130"}],"ssvc":null,"status":"published","title":"CESNET ipfixcol2 2.3.0 before 2.9.0 Buffer Overflow via Forwarder Output Plugin","updatedAt":1793826723697}