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CVE-2026-43623— microtar 0.1.0 Stack-Based Buffer Overflow via raw_to_header()

CVSS 8.8 · High

Possible ATT&CK Techniques 1AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProductVersion RangeStatus
rximicrotar≤ 0.1.0affected
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I. Basic Information for CVE-2026-43623

Vulnerability Information
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Vulnerability Title
microtar 0.1.0 Stack-Based Buffer Overflow via raw_to_header()
Source: NVD (National Vulnerability Database)
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
栈缓冲区溢出
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
rximicrotar 0 ~ 0.1.0 -

II. Public POCs for CVE-2026-43623

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III. Intelligence Information for CVE-2026-43623

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Patches & Fixes for CVE-2026-43623 (1)

Vendor Advisories for CVE-2026-43623 (2)

Other References for CVE-2026-43623 (1)

IV. Related Vulnerabilities

Same vendor: rxi
Same weakness: CWE-121

V. Comments for CVE-2026-43623

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