---
id: CVE-2026-70622
title: >-
  tar-rs versions 0.4.11 through 0.4.46 contain a symlink escape vulnerability
  in the Builder::append_dir_all() function that allows attackers to read files
  outside the intended source root directory by planting symlinks in an
  attacker-con…
summary: >-
  tar-rs versions 0.4.11 through 0.4.46 contain a symlink escape vulnerability
  in the Builder::append_dir_all() function that allows attackers to read files
  outside the intended source root directory by planting symlinks in an
  attacker-con…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-59
  - CWE-22
published: '2026-08-10'
updated: '2026-09-24'
sourceUpdated: '2026-09-24T20:43:32.537'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70622'
references:
  - url: 'https://gist.github.com/thesmartshadow/e7dac0bb690ee17b9cc142154cb11726'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/tar-rs-symlink-escape-via-append-dir-all
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-70622.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-70622'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2513575'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-70622'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-70622'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.0046
epssPercentile: 0.37132
ingestedAt: '2026-09-24T20:51:40.188Z'
vendor: Red Hat
product: Red Hat OpenShift Update Service
affected:
  - openshift_update_service
---

## Overview

tar-rs versions 0.4.11 through 0.4.46 contain a symlink escape vulnerability in the Builder::append_dir_all() function that allows attackers to read files outside the intended source root directory by planting symlinks in an attacker-controlled directory. When a privileged process archives an untrusted directory, the function follows symlinks without verifying that resolved targets remain within the source root, causing out-of-bounds files to be included in the archive as regular files and disclosed to the attacker.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Moderate · affected: Red Hat OpenShift Update Service · no fix planned: Red Hat OpenShift Update Service · updated 2026-09-25 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-70622.json)