VDB-364818 · CVE-2026-43619 · GHSA-4h9m-w5ff-j735

RsyncProject rsync up to 3.4.2 Exported Rsync toctou

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
5.3	$0-$5k	0.00

Summaryinfo

A vulnerability was found in RsyncProject rsync up to 3.4.2. It has been declared as problematic. This vulnerability affects unknown code of the component Exported Rsync Module. The manipulation results in toctou. This vulnerability was named CVE-2026-43619. The attack needs to be approached locally. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in RsyncProject rsync up to 3.4.2. Affected is some unknown processing of the component Exported Rsync Module. The manipulation with an unknown input leads to a toctou vulnerability. CWE is classifying the issue as CWE-367. The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check. This can cause the product to perform invalid actions when the resource is in an unexpected state. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

Rsync version 3.4.2 and prior contain symlink race condition vulnerabilities in path-based system calls including chmod, lchown, utimes, rename, unlink, mkdir, symlink, mknod, link, rmdir, and lstat that allow local attackers to redirect operations to files outside the exported rsync module. Attackers with local filesystem access can exploit the timing window between path resolution and syscall execution by swapping symlinks to apply sender-supplied permissions, ownership, timestamps, or filenames to arbitrary files outside the intended module boundary on rsync daemons configured with 'use chroot = no'.

The weakness was presented by Andrew Tridgell as GHSA-4h9m-w5ff-j735. The advisory is available at github.com. This vulnerability is traded as CVE-2026-43619 since 05/01/2026. The exploitability is told to be difficult. Local access is required to approach this attack. The technical details are unknown and an exploit is not available.

The vulnerability scanner Nessus provides a plugin with the ID 315780 (Debian dla-4591 : rsync - security update), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 3.4.3 eliminates this vulnerability. The upgrade is hosted for download at github.com.

The vulnerability is also documented in the databases at CNNVD (CNNVD-202605-4468), Tenable (315780) and CERT Bund (WID-SEC-2026-1611). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

Debian Linux
Fedora Linux
Ubuntu Linux
SUSE Linux
Open Source Rsync
SUSE openSUSE

Productinfo

Type

File Transfer Software

Vendor

RsyncProject

Name

rsync

Version

Website

Product: https://github.com/RsyncProject/rsync/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.4
VulDB Meta Temp Score: 5.3

VulDB Base Score: 4.5
VulDB Temp Score: 4.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock
Unlock	Unlock	Unlock	Unlock	Unlock	Unlock

VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Toctou
CWE: CWE-367 / CWE-362
CAPEC: 🔒
ATT&CK: 🔒

Physical: Partially
Local: Yes
Remote: No

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 315780
Nessus Name: Debian dla-4591 : rsync - security update

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: rsync 3.4.3

Timelineinfo

05/01/2026 CVE reserved
05/20/2026 +19 days Advisory disclosed
05/20/2026 +0 days VulDB entry created
06/02/2026 +12 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-4h9m-w5ff-j735
Researcher: Andrew Tridgell
Status: Confirmed

CVE: CVE-2026-43619 (🔒)
GCVE (CVE): GCVE-0-2026-43619
GCVE (VulDB): GCVE-100-364818
CERT Bund: WID-SEC-2026-1611 - Rsync: Mehrere Schwachstellen
CNNVD: CNNVD-202605-4468 - Rsync 后置链接漏洞

Entryinfo

Created: 05/20/2026 08:33
Updated: 06/02/2026 01:07
Changes: 05/20/2026 08:33 (79), 05/20/2026 19:32 (7), 05/21/2026 17:13 (2), 05/21/2026 21:01 (6), 05/26/2026 20:16 (1), 06/02/2026 01:07 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.