CVE-2026-32288

Unbounded allocation for old GNU sparse in archive/tar

CVSS 5.5 MEDIUMEPSS 0.3%

Vexday Risk Score

13Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 5.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

08 Apr 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Affected products

Go standard library · archive/tar

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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