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CVE-2026-32288

archive/tar: golang: Go's archive/tar package: Denial of Service via maliciously-crafted archive

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Severity

Moderate

Red Hat Product Security

4.3

CVSS 3.1

Review impact separately from score.

Published · April 8, 2026

Updated · October 30, 2026

Description

A flaw was found in Go's archive/tar package. A remote attacker could exploit this vulnerability by providing a maliciously-crafted archive file. When the tar.Reader processes an archive containing a large number of sparse regions in the "old GNU sparse map" format, it can lead to unbounded memory allocation. This can result in a Denial of Service (DoS) condition, making the affected application unresponsive.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.

CVSS / CWE

CVSS 3.1 · 4.3
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L

CWE-770 · Allocation of Resources Without Limits or Throttling