CVE-2026-53801
rsync < 3.5.0 Symlink Race Condition Directory Traversal
Description
rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's directory scanning logic that allows attackers to cause the sender to enumerate and transfer files outside the module root's intended subtree. Attackers who can create or manipulate symlinks in a path component of the scanned tree can replace a symlink with a directory entry pointing outside the module root between the lstat() call and the subsequent opendir() call, exposing files beyond the intended root in both daemon-mode and non-daemon sender-side scanning.
INFO
Published Date :
Aug. 13, 2026, 3:19 p.m.
Last Modified :
Oct. 24, 2026, 4:10 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | [email protected] | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | HIGH | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 4.0 | HIGH | [email protected] |
Solution
- Update rsync to a patched version.
- Avoid creating symlinks in scanned directories.
- Validate file transfer paths carefully.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-53801.
| URL | Resource |
|---|---|
| https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 | Product Release Notes |
| https://github.com/RsyncProject/rsync/security/advisories/GHSA-mch3-qr4p-chgm | Vendor Advisory |
| https://www.vulncheck.com/advisories/rsync-symlink-race-condition-directory-traversal | Release Notes Third Party Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-53801 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-53801
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-53801 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-53801 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Translated by [email protected]
Oct. 24, 2026
Action Type Old Value New Value Changed Translation Title: rsync de RsyncProject, Description: rsync anterior a 3.5.0 contiene una vulnerabilidad de condición de carrera de enlace simbólico en la lógica de escaneo de directorios del remitente que permite a los atacantes hacer que el remitente enumere y transfiera archivos fuera del subárbol previsto de la raíz del módulo. Atacantes que pueden crear o manipular enlaces simbólicos en un componente de ruta del árbol escaneado pueden reemplazar un enlace simbólico con una entrada de directorio que apunta fuera de la raíz del módulo entre la llamada a lstat() y la subsiguiente llamada a opendir(), exponiendo archivos más allá de la raíz prevista tanto en el escaneo del lado del remitente en modo demonio como en modo no demonio. Title: rsync de RsyncProject, Description: rsync anterior a 3.5.0 contiene una vulnerabilidad de condición de carrera de enlace simbólico en la lógica de escaneo de directorios del remitente que permite a los atacantes hacer que el remitente enumere y transfiera archivos fuera del subárbol previsto de la raíz del módulo. Atacantes que pueden crear o manipular enlaces simbólicos en un componente de ruta del árbol escaneado pueden reemplazar un enlace simbólico con una entrada de directorio que apunta fuera de la raíz del módulo entre la llamada a lstat() y la subsiguiente llamada a opendir(), exponiendo archivos más allá de la raíz prevista tanto en el escaneo del lado del remitente en modo demonio como en modo no demonio. -
CVE Translated by [email protected]
Oct. 23, 2026
Action Type Old Value New Value Added Translation Title: rsync de RsyncProject, Description: rsync anterior a 3.5.0 contiene una vulnerabilidad de condición de carrera de enlace simbólico en la lógica de escaneo de directorios del remitente que permite a los atacantes hacer que el remitente enumere y transfiera archivos fuera del subárbol previsto de la raíz del módulo. Atacantes que pueden crear o manipular enlaces simbólicos en un componente de ruta del árbol escaneado pueden reemplazar un enlace simbólico con una entrada de directorio que apunta fuera de la raíz del módulo entre la llamada a lstat() y la subsiguiente llamada a opendir(), exponiendo archivos más allá de la raíz prevista tanto en el escaneo del lado del remitente en modo demonio como en modo no demonio. -
Initial Analysis by [email protected]
Aug. 31, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:* versions up to (excluding) 3.5.0 Added Reference Type VulnCheck: https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 Types: Product, Release Notes Added Reference Type VulnCheck: https://github.com/RsyncProject/rsync/security/advisories/GHSA-mch3-qr4p-chgm Types: Vendor Advisory Added Reference Type VulnCheck: https://www.vulncheck.com/advisories/rsync-symlink-race-condition-directory-traversal Types: Release Notes, Third Party Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Aug. 14, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-53801', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-08-14T15:51:53.999454Z'} -
New CVE Received by [email protected]
Aug. 13, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://github.com/RsyncProject/rsync', 'vendor': 'RsyncProject', 'product': 'rsync', 'versions': [{'status': 'affected', 'version': '0', 'versionType': 'semver', 'lessThanOrEqual': '3.4.4'}, {'status': 'unaffected', 'version': '3.5.0', 'versionType': 'semver'}], 'packageURL': 'pkg:github/RsyncProject/rsync', 'defaultStatus': 'unaffected'}] Added Description rsync before 3.5.0 contains a symlink race condition vulnerability in the sender's directory scanning logic that allows attackers to cause the sender to enumerate and transfer files outside the module root's intended subtree. Attackers who can create or manipulate symlinks in a path component of the scanned tree can replace a symlink with a directory entry pointing outside the module root between the lstat() call and the subsequent opendir() call, exposing files beyond the intended root in both daemon-mode and non-daemon sender-side scanning. Added CVSS V4.0 AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N Added CWE CWE-59 Added CWE CWE-367 Added Reference https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 Added Reference https://github.com/RsyncProject/rsync/security/advisories/GHSA-mch3-qr4p-chgm Added Reference https://www.vulncheck.com/advisories/rsync-symlink-race-condition-directory-traversal