Unbounded allocation for old GNU sparse in archive/tar

These records connect through source-stated identifiers. Shared identifiers or dates alone do not establish shared exposure, root cause or applicability.

CVE-2026-32288 · Microsoft / collected KEV context

EUVD-2026-20016

GHSA-x4jj-h2v8-hqqv

GO-2026-4869

BIT-golang-2026-32288

cve-program · CVE-2026-32288

• 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

euvd · EUVD-2026-20016

• 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

nvd · CVE-2026-32288

• 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

osv · GO-2026-4869

• https://go.dev/cl/763766
• https://go.dev/issue/78301
• https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU

• 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. · Advisory content revised · 1 Nov 2026
• Release 2026-05-29 · Tool release · 4 Jun 2026