{"id":"CVE-2026-71267","published":"2026-08-05T13:24:50.963","lastModified":"2026-08-10T12:17:29.157","description":"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 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.","cvssScore":9.8,"cvssSeverity":"CRITICAL","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","cwes":["CWE-121"],"vendors":[],"products":[],"references":[{"url":"https://github.com/rxi/microtar","tags":[]},{"url":"https://github.com/rxi/microtar/blob/master/src/microtar.c","tags":[]}],"exploitRefs":[{"url":"https://github.com/rxi/microtar","tags":[]},{"url":"https://github.com/rxi/microtar/blob/master/src/microtar.c","tags":[]}],"hasPoc":true,"ai":{"summary":"The flaw allows an attacker to overwrite critical data on the stack by supplying a long entry name, potentially leading to remote code execution.","exploitability":"Exploitation is relatively easy given that no input validation is performed before copying the string into a fixed-size buffer.","blast_radius":"If exploited, this could lead to full system compromise, as it affects core file handling functions.","remediation":"Update microtar to a patched version or apply a fix that properly validates and limits the length of input names.","tags":["rce","stack-overflow","buffer-overflow","critical"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-08-11T06:43:39.556Z"}}