{"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 in microtar allows an attacker to overwrite the 100-byte field of a stack-allocated structure via a long entry name, leading to potential buffer overflow and execution of arbitrary code.","exploitability":"Exploitation is relatively straightforward given the lack of input validation, and requires an attacker to supply a long entry name.","blast_radius":"If exploited, this flaw could lead to full system compromise, as it allows for arbitrary code execution.","remediation":"Upgrade to the latest version of microtar, or apply the specific patch provided by the vendor.","detection":"No reliable host or network indicator is derivable from the published description.","tags":["rce","buffer-overflow","stack-overflow","arbitrary-code-execution"],"model":"qwen2.5:7b-instruct","analyzedAt":"2026-09-28T09:00:08.874Z"}}