CVE-2026-43623

HIGH SEVERITY

CVSS Score & Metrics

Base Score

8.8 / 10

Vector String

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

Vulnerability Description

microtar through 0.1.0 contains a stack-based buffer overflow vulnerability in the raw_to_header() function in src/microtar.c that allows attackers to corrupt adjacent stack memory by supplying a crafted TAR archive with non-null-terminated name or linkname fields. The function uses strcpy() to copy 100-byte ustar format fields that lack null terminators, causing writes of up to 355 bytes into a 100-byte destination buffer when mtar_open(), mtar_find(), or mtar_read_header() process attacker-supplied TAR archives.

Vulnerability Details

Published Date

June 01, 2026

Last Modified

June 01, 2026

CWE ID

CWE-121

Source

NVD

Vendor

rxi

Product

microtar

External References

https://github.com/rxi/microtar/issues/28
https://github.com/rxi/microtar/issues/29
https://github.com/rxi/microtar/issues/30
https://www.vulncheck.com/advisories/microtar-stack-based-buffer-overflow-via-raw-to-header

CVE-2026-43623

CVSS Score & Metrics

Vulnerability Description

Vulnerability Details

External References

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