---
id: CVE-2026-55738
title: >-
  A stack-based buffer overflow exists in the raw_to_header function in
  src/microtar.c in rxi microtar 0.1.0
summary: >-
  A stack-based buffer overflow exists in the raw_to_header function in
  src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name
  and linkname fields of a TAR header with strcpy without guaranteeing null
  termination of th…
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-121
  - CWE-170
published: '2026-06-17'
updated: '2026-08-10'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55738'
references:
  - url: 'https://github.com/rxi/microtar'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
  - url: 'https://github.com/rxi/microtar/blob/master/src/microtar.c#L111'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
  - url: 'https://raw.githubusercontent.com/rxi/microtar/master/src/microtar.c'
    label: 309f9ea4-e3e9-4c6c-b79d-e8eb01244f2c
tags:
  - nvd
epss: 0.00554
epssPercentile: 0.43874
ingestedAt: '2026-08-10T12:39:46.906Z'
---

## Overview

A stack-based buffer overflow exists in the raw_to_header function in src/microtar.c in rxi microtar 0.1.0. The function copies the 100-byte name and linkname fields of a TAR header with strcpy without guaranteeing null termination of the source.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.