CVE-2026-32288

Unbounded allocation for old GNU sparse in archive/tar

MEDIUM

5.5

CVSS Score

Published: April 8, 2026 at 01:06 AM UTC

Updated: July 25, 2026 at 10:21 AM UTC

2 products affected across 2 vendorsGoGo

Using archive/tar by Go standard library?

Get instant alerts when new vulnerabilities affect archive/tar - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.5

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Go · Golang

95%

v < 1.25.91.26.0 ≤ v < 1.26.2

Affected range stops below 1.25.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.26.2, so it looks safe — our inference, not a vendor statement

Go · Go Standard Librarygo

60%

v < 1.25.91.26.0-0 ≤ v < 1.26.21.26.0-0

Affected range stops below 1.25.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 1.26.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (4)

Patch

Source: cverecord

https://go.dev/cl/763766

Issue Tracking

Source: cverecord

https://go.dev/issue/78301

Mailing ListRelease Notes

Source: cverecord

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

Vendor Advisory

Source: cverecord

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.5MEDIUMCISA-ADP

Attack Vector: LOCAL
Complexity: LOW
Privileges: NONE
User Interaction: REQUIRED
Scope: UNCHANGED
Confidentiality: NONE
Integrity: NONE
Availability: HIGH

Vector?

Quick Info

StatusANALYZED

CWE

CWE-770

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card