CVE-2026-49837

GoBGP (open source BGP implementation in Go) versions prior to 4.6.0 contain a boundary validation flaw in the BGP OPEN capability parser. Several capability decoders read from the full remaining buffer instead of the slice bounded by the declared CapLen , allowing a malformed OPEN message to cau...

CVE-2026-49837 GoBGP: BGP OPEN capability parser may read capability values outside declared CapLen boundaries

GoBGP is an open source Border Gateway Protocol BGP implementation in the Go Programming Language. Versions prior to 4.6.0 contain a BGP OPEN capability parsing issue where several concrete capability decoders may parse data from the full remaining capability buffer instead of the slice bounded b...