CVE-2026-71267

CRITICAL 9.8

microtar Stack Buffer Overflow in mtar_write_file_header() and mtar_write_dir_header()

CVSS Score

9.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-121
Vendor	rxi
Product	microtar
Published	Aug 5, 2026
Last Updated	Aug 10, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

rxi / microtar

0 ≤ *

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/rxi/microtar github.com: https://github.com/rxi/microtar/blob/master/src/microtar.c

Credits

Alibek Baxtiyorov