---
id: CVE-2026-53783
title: "rsync before\_3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink…"
summary: "rsync before\_3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink…"
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'
cwe:
  - CWE-59
  - CWE-88
published: '2026-08-13'
updated: '2026-09-08'
sourceUpdated: '2026-09-08T20:28:37.587'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53783'
references:
  - url: 'https://github.com/RsyncProject/rsync/releases/tag/v3.5.0'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/RsyncProject/rsync/security/advisories/GHSA-9cgc-64g4-3gv5
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/rsync-toctou-race-condition-directory-escape-via-rrsync
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53783.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-53783'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2515419'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-53783'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53783'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67463'
  - url: 'https://access.redhat.com/errata/RHSA-2026:67462'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
epss: 0.00374
epssPercentile: 0.31166
ingestedAt: '2026-09-08T21:11:12.276Z'
vendor: Red Hat
product: Red Hat Enterprise Linux BaseOS (v. 10)
affected:
  - enterprise_linux 6
  - enterprise_linux 7
  - enterprise_linux 8
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - enterprise_linux_baseos_v_10
  - enterprise_linux_baseos_v_9
patched:
  - enterprise_linux_appstream_v_10
  - enterprise_linux_appstream_v_9
  - enterprise_linux_baseos_v_10
  - enterprise_linux_baseos_v_9
---

## Overview

rsync before 3.5.0 contains a time-of-check to time-of-use (TOCTOU) race condition vulnerability in the rrsync restricted shell wrapper that allows authenticated clients to escape enforced directory restrictions by substituting a symlink for a path component after validation but before transfer processing. Attackers can additionally leverage unrestricted flags such as --copy-unsafe-links, -D, and --log-file through rrsync to read or write files outside the permitted directory subtree.

## Remediation

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

## Vendor advisories

- **RHSA-2026:67463** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10), Red Hat Enterprise Linux BaseOS (v. 10) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67463)
- **RHSA-2026:67462** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9), Red Hat Enterprise Linux BaseOS (v. 9) · released 2026-09-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:67462)
- **Red Hat VEX** · Important · affected: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8 · updated 2026-09-14 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53783.json)