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.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction Required

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00004.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
Go standard library archive/tar unaffected
Version Status Constraints
0 affected < 1.25.9
1.26.0-0 affected < 1.26.2

Configuration 1 [-]

OR cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*

No data.

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Vendors Products
Go Standard Library Subscribe
Archive/tar Subscribe

Project Subscriptions

Vendors Products
Go Standard Library Subscribe
Archive/tar Subscribe
Golang Subscribe
Go Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://go.dev/cl/763766 cve-icon cve-icon cve-icon
https://go.dev/issue/78301 cve-icon cve-icon cve-icon
https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-32288 cve-icon
https://pkg.go.dev/vuln/GO-2026-4869 cve-icon cve-icon cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-32288 cve-icon
History

Thu, 16 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
First Time appeared Golang
Golang go
CPEs cpe:2.3:a:golang:go:*:*:*:*:*:*:*:*
Vendors & Products Golang
Golang go

Mon, 13 Apr 2026 19:15:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}

 ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

cvssV3_1

{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'}

Thu, 09 Apr 2026 08:30:00 +0000

Type Values Removed Values Added
First Time appeared Go Standard Library
Go Standard Library archive/tar
Weaknesses CWE-789
Vendors & Products Go Standard Library
Go Standard Library archive/tar

Thu, 09 Apr 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-770
References
Metrics threat_severity

None

 cvssV3_1

{'score': 4.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L'}

threat_severity

Moderate

Wed, 08 Apr 2026 20:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-789

Wed, 08 Apr 2026 01:45:00 +0000

Type Values Removed Values Added
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.
Title Unbounded allocation for old GNU sparse in archive/tar
References

Projects

Sign in to view the affected projects.

cve-icon MITRE

Status: PUBLISHED

Assigner: Go

Published:

Updated: 2026-04-13T18:20:08.191Z

Reserved: 2026-03-11T16:38:46.557Z

Link: CVE-2026-32288

cve-icon Vulnrichment

Updated: 2026-04-13T17:51:02.647Z

cve-icon NVD

Status : Analyzed

Published: 2026-04-08T02:16:03.707

Modified: 2026-04-16T19:08:52.240

Link: CVE-2026-32288

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-08T01:06:57Z

Links: CVE-2026-32288 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-04-14T16:40:16Z

Weaknesses