What is CVE-2026-32288?

CVE-2026-32288 is a medium-severity vulnerability in Golang Go, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.5/10. Published 2026-04-08.

How severe is CVE-2026-32288?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Resource exhaustion in Golang Go

CVE-2026-32288

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 2026-04-08 · last modified 2026-07-25.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.002 (7.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 7th percentile — 7.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.002 · change: -0.001

Affected products

Golang Go
Go Standard Library Archive/tar — versions 0, 1.26.0-0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

go.dev/cl/763766 (Patch)
go.dev/issue/78301 (Issue Tracking)
groups.google.com/g/golang-announce/c/0uYbvbPZRWU (Mailing List, Release Notes)
pkg.go.dev/vuln/GO-2026-4869 (Vendor Advisory)

Frequently asked questions

What is CVE-2026-32288?: CVE-2026-32288 is a medium-severity vulnerability in Golang Go, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.5/10. Published 2026-04-08.
How severe is CVE-2026-32288?: Medium severity. CVSS v3 base score is 5.5 out of 10.