{"schema_version":"1.3.1","id":"GO-2026-4869","modified":"2026-04-07T22:53:49Z","published":"2026-04-07T22:53:49Z","aliases":["CVE-2026-32288"],"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"},"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"]}]}}],"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"}],"credits":[{"name":"Colin Walters (walters@verbum.org)"},{"name":"Uuganbayar Lkhamsuren (https://github.com/uug4na)"},{"name":"Jakub Ciolek"}],"database_specific":{"url":"https://pkg.go.dev/vuln/GO-2026-4869","review_status":"REVIEWED"}}