Vulnerability · Published Aug 5, 2026 · Assigned by TuranSec
CVE-2026-71267microtar Stack Buffer Overflow in mtar_write_file_header() and mtar_write_dir_header()
Critical 9.8
In plain English
A critical-severity stack buffer overflow in microtar from rxi. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 46% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.6%top 53.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-121 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://github.com/rxi/microtar third-party-advisory
- https://github.com/rxi/microtar/blob/master/src/microtar.c third-party-advisory