{"id":"CVE-2026-37462","aliases":["GHSA-pw7p-7fqv-hpj8","GO-2026-5971"],"title":"GoBGP: Integer underflow in the BGPUpdate.DecodeFromBytes function","summary":"GoBGP: Integer underflow in the BGPUpdate.DecodeFromBytes function","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","vendor":"osrg","product":"github.com/osrg/gobgp/v4","ecosystem":"go","affected":["github.com/osrg/gobgp/v4 < 4.4.0"],"patched":["github.com/osrg/gobgp/v4 4.4.0"],"published":"2026-06-03","updated":"2026-07-24","source":"OSV","sourceUrl":"https://osv.dev/vulnerability/GHSA-pw7p-7fqv-hpj8","references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-37462"},{"url":"https://github.com/osrg/gobgp/commit/9ce8936672ebc07df524da77fa4c6ae26d92be6d"},{"url":"https://github.com/osrg/gobgp"},{"url":"https://github.com/osrg/gobgp/blob/v4.3.0/pkg/packet/bgp/bgp.go"}],"tags":["osv","go"],"epss":0.00279,"epssPercentile":0.20615,"ingestedAt":"2026-07-25T19:08:11.814Z","slug":"CVE-2026-37462","body":"## Overview\n\nAn integer underflow in the BGPUpdate.DecodeFromBytes function (/bgp/bgp.go) of gobgp v4.3.0 allows attackers to cause a Denial of Service (DoS) via supplying a crafted BGP UPDATE message.\n\n## Affected packages\n\n- `github.com/osrg/gobgp/v4 < 4.4.0`\n\n## Remediation\n\nUpgrade to a patched release:\n\n- `github.com/osrg/gobgp/v4 4.4.0`","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}