Home

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.

PUBLISHED Reserved 2026-03-11 | Published 2026-04-08 | Updated 2026-04-13 | Assigner Go

Problem types

CWE-400: Uncontrolled Resource Consumption

Product status

Default status
unaffected

Any version before 1.25.9
affected

1.26.0-0 (semver) before 1.26.2
affected

Credits

Colin Walters (walters@verbum.org)

Uuganbayar Lkhamsuren (https://github.com/uug4na)

Jakub Ciolek

References

go.dev/cl/763766

go.dev/issue/78301

groups.google.com/g/golang-announce/c/0uYbvbPZRWU

pkg.go.dev/vuln/GO-2026-4869

cve.org (CVE-2026-32288)

nvd.nist.gov (CVE-2026-32288)

Download JSON