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
2026-06-01T18:04:14Z
Modified
2026-10-28T02:30:42Z
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 raw_to_header() 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 mtar_open(), mtar_find(), or mtar_read_header() 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
0 Unknown introduced commit / All previous commits are affected
Last Affected
956791770defa4d06696b30db276e88a09ad3538
Database specific
Show details 
{
    "extracted_events":  [
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "0.1.0"
                }
            ],
            "source":  "AFFECTED_FIELD",
            "strategy":  "StandardRange"
        },
        {
            "range":  [
                {
                    "introduced":  "0"
                },
                {
                    "last_affected":  "0.1.0"
                }
            ],
            "source":  "DESCRIPTION"
        }
    ]
}

Affected versions

v0.*
v0.1.0

Database specific

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