CVE-2026-43623

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.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
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

Configurations

No configuration.

History

01 Jun 2026, 19:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-01 19:16

Updated : 2026-06-02 14:43

NVD link : CVE-2026-43623

Mitre link : CVE-2026-43623

CVE.ORG link : CVE-2026-43623

JSON object : View

Products Affected

No product.

CWE

CWE-121

Stack-based Buffer Overflow

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