{"id":"GO-2026-4869","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.","aliases":["CVE-2026-32288"],"modified":"2026-04-08T01:15:36.295226Z","published":"2026-04-07T22:53:49Z","database_specific":{"review_status":"REVIEWED","url":"https://pkg.go.dev/vuln/GO-2026-4869"},"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"}],"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"}}],"schema_version":"1.7.5","credits":[{"name":"Colin Walters (walters@verbum.org)"},{"name":"Uuganbayar Lkhamsuren (https://github.com/uug4na)"},{"name":"Jakub Ciolek"}]}