CVE-2026-109380

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Source

https://cve.org/CVERecord?id=CVE-2026-109380

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109380.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-109380

Published

2026-10-12T20:55:11Z

Modified

2026-10-13T10:48:27Z

Severity

8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

modern-tar 0.3.5 through 0.8.5 Memory Exhaustion via Malformed Octal Size Field

Details

modern-tar 0.3.5 through 0.8.5 contains a memory exhaustion vulnerability that allows attackers to produce negative entry sizes via non-octal bytes parsed by readOctal(). Attackers can supply a crafted, optionally gzip-compressed, archive to unpackTar() that buffers chunks indefinitely, exhausting process memory and suppressing later entries.

Database specific

{
    "cna_assigner":  "VulnCheck",
    "cwe_ids":  [
        "CWE-1284"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/109xxx/CVE-2026-109380.json"
}

References

Affected packages

Git / github.com/ayuhito/modern-tar

Affected ranges

Type

GIT

Repo

https://github.com/ayuhito/modern-tar

Events

Introduced

5f181c659e12b04496da7aaae76257f77b7df627

Last Affected

54f79c38d93d061d6bf07eb75f0a4c1e78146c4d

Database specific

Show details

{
    "extracted_events":  [
        {
            "introduced":  "0.3.5"
        },
        {
            "last_affected":  "0.8.5"
        }
    ],
    "source":  "AFFECTED_FIELD"
}

Affected versions

v0.*

v0.3.5

v0.4.0

v0.4.1

v0.4.2

v0.5.0

v0.5.1

v0.5.2

v0.5.3

v0.5.4

v0.5.5

v0.6.0

v0.6.1

v0.7.0

v0.7.1

v0.7.2

v0.7.3

v0.7.4

v0.7.5

v0.7.6

v0.7.7

v0.8.0

v0.8.1

v0.8.2

v0.8.3

v0.8.4

v0.8.5

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-109380.json"