{"id":"CVE-2026-122130","published":"2026-11-04T21:18:08.543","lastModified":"2026-11-04T21:18:08.543","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.","cvssScore":8.2,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H","cwes":["CWE-190"],"vendors":[],"products":[],"references":[{"url":"https://github.com/CESNET/ipfixcol2","tags":[]},{"url":"https://github.com/CESNET/ipfixcol2/blob/v2.8.0/src/plugins/output/forwarder/src/Message.cpp#L134-L156","tags":[]},{"url":"https://github.com/CESNET/ipfixcol2/commit/ad206f6217257b06b139f1b2bce50d52f5bc6acb","tags":[]},{"url":"https://github.com/CESNET/ipfixcol2/releases/tag/v2.9.0","tags":[]},{"url":"https://www.vulncheck.com/advisories/cesnet-ipfixcol2-2.3.0-before-2.9.0-buffer-overflow-via-forwarder-output-plugin","tags":[]}],"exploitRefs":[{"url":"https://github.com/CESNET/ipfixcol2","tags":[]},{"url":"https://github.com/CESNET/ipfixcol2/blob/v2.8.0/src/plugins/output/forwarder/src/Message.cpp#L134-L156","tags":[]},{"url":"https://github.com/CESNET/ipfixcol2/commit/ad206f6217257b06b139f1b2bce50d52f5bc6acb","tags":[]},{"url":"https://github.com/CESNET/ipfixcol2/releases/tag/v2.9.0","tags":[]}],"hasPoc":true,"ai":null}