CVE-2026-43623

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Source

https://cve.org/CVERecord?id=CVE-2026-43623

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43623.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-43623

Published

2026-06-01T18:04:14.379Z

Modified

2026-07-08T08:09:36.689301996Z

Severity

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

Summary

microtar 0.1.0 Stack-Based Buffer Overflow via raw_to_header()

Details

microtar through 0.1.0 contains a stack-based buffer overflow vulnerability in the rawtoheader() function in src/microtar.c that allows attackers to corrupt adjacent stack memory by supplying a crafted TAR archive with non-null-terminated name or linkname fields. The function uses strcpy() to copy 100-byte ustar format fields that lack null terminators, causing writes of up to 355 bytes into a 100-byte destination buffer when mtaropen(), mtarfind(), or mtarreadheader() process attacker-supplied TAR archives.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-121"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43623.json"
}

References

Affected packages

Git / github.com/rxi/microtar

Affected ranges

Type

GIT

Repo

https://github.com/rxi/microtar

Events

Introduced

Fixed

956791770defa4d06696b30db276e88a09ad3538

Database specific

{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "0.1.0"
        },
        {
            "fixed": "0.1.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "DESCRIPTION"
    ]
}

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43623.json"