CVE-2026-9538

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Source
https://cve.org/CVERecord?id=CVE-2026-9538
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-9538.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2026-9538
Downstream
Published
2026-05-26T00:18:43.704Z
Modified
2026-06-18T03:56:46.707243077Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Summary
Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header
Details

Archive::Tar versions before 3.10 for Perl allow memory exhaustion via attacker controlled entry size field in tar header.

readtar() reads each entry's payload with $handle->read($$data, $block), where $block is derived from the entry's 12-byte size field in the tar header with no upper bound on that value.

A crafted header declaring a multi-gigabyte size causes Perl to allocate a scalar of that size.

Database specific 
{
    "cna_assigner": "CPANSec",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/9xxx/CVE-2026-9538.json",
    "cwe_ids": [
        "CWE-789"
    ]
}
References

Affected packages

Git / github.com/jib/archive-tar-new

Affected ranges

Type
GIT
Repo
https://github.com/jib/archive-tar-new
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
737c9e68a65fe7d494c0fcaed355e105f8f564ad
Fixed
f9af01426038e29d9578825a0cd3626946ab08c7
Database specific 
{
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "3.10"
        }
    ],
    "cpe": "cpe:2.3:a:archive\\:\\:tar_project:archive\\:\\:tar:*:*:*:*:*:perl:*:*"
}

Affected versions

1.*
1.78
1.80
1.82
1.84
1.86
1.88
1.92
1.93_01
1.93_02
1.94
1.96
1.98
2.*
2.00
2.02
2.04
2.06
2.08
2.10
2.12
2.14
2.16
2.18
2.20
2.22
2.24
2.26
2.28
2.30
2.32
2.34
2.36
2.38
2.40
3.*
3.00
3.02
3.04
3.06
3.08

Database specific

source 
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2026-9538.json"