{"id":"CVE-2026-32288","state":"PUBLISHED","title":"Unbounded allocation for old GNU sparse in archive/tar","description":"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.","publishedAt":"2026-04-08T01:06:57.416Z","updatedAt":"2026-04-13T18:20:08.191Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Go","products":["Go standard library archive/tar"],"affected":[{"vendor":"Go standard library","product":"archive/tar","packageName":"archive/tar","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.25.9","versionType":"semver"},{"version":"1.26.0-0","status":"affected","lessThan":"1.26.2","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"Reader.readOldGNUSparseMap"},{"name":"readGNUSparseMap1x0"},{"name":"Reader.Next"}]}],"references":["https://go.dev/cl/763766","https://go.dev/issue/78301","https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU","https://pkg.go.dev/vuln/GO-2026-4869"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/32xxx/CVE-2026-32288.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-32288","state":"PUBLISHED","datePublished":"2026-04-08T01:06:57.416Z","dateUpdated":"2026-04-13T18:20:08.191Z","assignerShortName":"Go","assignerOrgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateReserved":"2026-03-11T16:38:46.557Z"},"containers":{"cna":{"title":"Unbounded allocation for old GNU sparse in archive/tar","descriptions":[{"lang":"en","value":"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":[{"vendor":"Go standard library","product":"archive/tar","packageName":"archive/tar","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"1.25.9","versionType":"semver"},{"version":"1.26.0-0","status":"affected","lessThan":"1.26.2","versionType":"semver"}],"collectionURL":"https://pkg.go.dev","programRoutines":[{"name":"Reader.readOldGNUSparseMap"},{"name":"readGNUSparseMap1x0"},{"name":"Reader.Next"}]}],"references":[{"url":"https://go.dev/cl/763766"},{"url":"https://go.dev/issue/78301"},{"url":"https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"},{"url":"https://pkg.go.dev/vuln/GO-2026-4869"}],"problemTypes":[{"descriptions":[{"lang":"en","description":"CWE-400: Uncontrolled Resource Consumption"}]}],"providerMetadata":{"shortName":"Go","orgId":"1bb62c36-49e3-4200-9d77-64a1400537cc","dateUpdated":"2026-04-08T01:06:57.416Z"},"credits":[{"lang":"en","value":"Colin Walters (walters@verbum.org)"},{"lang":"en","value":"Uuganbayar Lkhamsuren (https://github.com/uug4na)"},{"lang":"en","value":"Jakub Ciolek"}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"REQUIRED","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-04-13T17:51:05.649111Z","id":"CVE-2026-32288","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-13T18:20:08.191Z"}}]}}}