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  4. CVE 2026 32288 unbounded allocation for old gnu sparse in
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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-32288

Unbounded allocation for old GNU sparse in archive/tarCVE-2026-32288

Answer in brief

CVE-2026-32288 records a Unknown severity vulnerability in Unbounded allocation for old GNU sparse in archive/tar. The current sources do not mark it as known exploited. The current feed maps stdlib (go). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Apr 7, 2026Updated Oct 7, 2026Source checked Oct 8, 2026First seen by HOL Aug 7, 2026Material review Oct 7, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps stdlib (go). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
stdlibgo>=0 <1.25.9 >=1.26.0-0 <1.26.21.25.9, 1.26.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for stdlib.
  2. 2Review the reported fix. Update stdlib to 1.25.9 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Apr 7, 2026

    Evidence: source:osv:source_dates:source-dates:record

  2. Source modified

    Oct 7, 2026

    Evidence: source:osv:source_dates:source-dates:record

  3. First seen by HOL

    Aug 7, 2026

Sources and claim methodology

  • Source referencego.dev
  • Source referencego.dev
  • Source referencegroups.google.com
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
Not reported
Source
OSV
Source checked
Oct 8, 2026
References
3 linked sources
Open source record