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Vulnerability record · CVE-2026-71267 · published 5 August 2026

CVE-2026-71267: Stack-based buffer overflow vulnerability

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.

9.8 CVSS 3.1 Critical EPSS 0.55% · top 56.0% CWE-121 · Stack-based buffer overflow Deferred
9.8CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
26 Aug 2026Last modified by NVD

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.

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

References

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

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Source: NIST National Vulnerability Database (record CVE-2026-71267), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.