{"api_version":"1","generated_at":"2026-06-17T18:14:21+00:00","cve":"CVE-2026-55738","urls":{"html":"https://cve.report/CVE-2026-55738","api":"https://cve.report/api/cve/CVE-2026-55738.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-55738","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55738"},"summary":{"title":"Stack Buffer Overflow in rxi/microtar raw_to_header() via non-null-terminated TAR name field","description":"A stack-based buffer overflow exists in the raw_to_header() function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy() without guaranteeing null termination of the source. The POSIX ustar format permits these fixed-width fields to be fully populated with non-null bytes, so a crafted archive whose linkname field (followed by the trailing padding of the 512-byte raw header) contains no null terminator causes strcpy() to read past the end of the 512-byte raw header stack buffer and to write past the destination header buffer. A remote attacker who supplies a crafted TAR archive that the victim opens or parses (via mtar_open(), mtar_read_header(), or mtar_find()) can cause an out-of-bounds read and a stack buffer overflow, resulting in denial of service (crash) and potentially arbitrary code execution. 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