{"schema_version":"1.7.5","id":"GO-2026-4869","published":"2026-04-07T22:53:49Z","modified":"2026-05-15T10:59:23.054049848Z","aliases":["BIT-golang-2026-32288","CVE-2026-32288"],"related":["CGA-6f85-jvrm-qq3w","RHSA-2026:7291","RHSA-2026:7385"],"summary":"Unbounded allocation for old GNU sparse in archive/tar","details":"tar.Reader can allocate an unbounded amount of memory when reading a maliciously-crafted archive containing a large number of sparse regions encoded in the \"old GNU sparse map\" format.","affected":[{"package":{"name":"stdlib","ecosystem":"Go","purl":"pkg:golang/stdlib"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.25.9"},{"introduced":"1.26.0-0"},{"fixed":"1.26.2"}]}],"ecosystem_specific":{"imports":[{"path":"archive/tar","symbols":["Reader.Next","Reader.readOldGNUSparseMap","readGNUSparseMap1x0"]}]},"database_specific":{"source":"https://vuln.go.dev/ID/GO-2026-4869.json"}}],"references":[{"type":"FIX","url":"https://go.dev/cl/763766"},{"type":"REPORT","url":"https://go.dev/issue/78301"},{"type":"WEB","url":"https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"}],"database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-4869"},"credits":[{"name":"Colin Walters (walters@verbum.org)"},{"name":"Uuganbayar Lkhamsuren (https://github.com/uug4na)"},{"name":"Jakub Ciolek"}]}