CVE-2026-71267CWE-121

CVE-2026-71267

Critical · published August 5, 2026

CVSS v3.1
9.8
EPSS
1%
Percentile
45.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
9.8 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00553 · 45.4th percentile
Weakness
CWE-121 · Stack-based Buffer Overflow
Published
2026-08-05T17:24Z
References (2)
https://github.com/rxi/microtar · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2chttps://github.com/rxi/microtar/blob/master/src/microtar.c · 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
EPSS history
Timeline
  • 05 AUG 12:26Z
    microtar Stack Buffer Overflow in mtar_write_file_header() and mtar_write_dir_header()
    cvelistv5