---
id: "CVE-2026-124745"
page: "https://infrastack.ai/live/CVE-2026-124745"
kind: "vulnerability"
aliases: ["CVE-2026-124745"]
title: "BusyBox tar: crafted archive can overwrite files outside extraction directory"
severity: "medium"
cvss: 6.3
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["busybox", "containers", "embedded", "infrastructure", "linux"]
not_affected_if: ["no-untrusted-archives"]
published_at: "2026-11-11T13:17:20+00:00"
first_seen_at: "2026-11-11T13:27:13+00:00"
updated_at: "2026-11-11T13:29:21+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124745", "first_seen_at": "2026-11-11T13:27:13+00:00"}]
exploit_sources: []
---

# BusyBox tar: crafted archive can overwrite files outside extraction directory

Link for people: https://infrastack.ai/live/CVE-2026-124745 (this .md is for agents)

BusyBox tar mishandles deferred hardlink targets that pass through symbolic links pointing outside the extraction directory. A specially crafted archive can make later extraction overwrite arbitrary files on the system.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-11T13:27:13+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124745

## From the sources

A flaw was found in BusyBox. When extracting an archive, the tar utility improperly resolves deferred hardlink targets across symbolic links pointing outside the intended extraction directory. An attacker could provide a specially crafted archive that links to sensitive files outside the extraction tree, allowing subsequent extraction operations to overwrite arbitrary files on the system.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_