{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-71267", "assignerOrgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "state": "PUBLISHED", "assignerShortName": "TuranSec", "dateReserved": "2026-08-05T12:23:34.967Z", "datePublished": "2026-08-05T12:26:14.990Z", "dateUpdated": "2026-08-05T12:26:14.990Z"}, "containers": {"cna": {"title": "microtar Stack Buffer Overflow in mtar_write_file_header() and mtar_write_dir_header()", "descriptions": [{"lang": "en", "value": "microtar's mtar_write_file_header() and mtar_write_dir_header() functions (src/microtar.c) copy a caller-supplied entry name into the 100-byte `name` field of a stack-allocated mtar_header_t via strcpy(h.name, name), with no check that strlen(name) is less than 100 before the copy. Any application that calls these functions with an externally-influenced filename longer than 99 characters (e.g. when archiving user-supplied or attacker-controlled filenames) triggers a stack buffer overflow."}], "problemTypes": [{"descriptions": [{"lang": "en", "description": "CWE-121", "cweId": "CWE-121", "type": "CWE"}]}], "affected": [{"vendor": "rxi", "product": "microtar", "programFiles": ["src/microtar.c"], "versions": [{"version": "0", "lessThanOrEqual": "*", "status": "affected", "versionType": "custom"}], "defaultStatus": "unaffected"}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 9.8, "baseSeverity": "CRITICAL"}}], "references": [{"url": "https://github.com/rxi/microtar"}, {"url": "https://github.com/rxi/microtar/blob/master/src/microtar.c"}], "credits": [{"lang": "en", "value": "Alibek Baxtiyorov", "type": "finder"}], "providerMetadata": {"orgId": "309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c", "shortName": "TuranSec", "dateUpdated": "2026-08-05T12:26:14.990Z"}}}}

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