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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-70452 Detail

Description

rsync 3.1.0 before 3.5.0 contains an access control bypass vulnerability that allows remote attackers to circumvent hosts deny rules by inducing DNS resolution failures during hostname-based access control evaluation. When a DNS lookup for a hostname-based deny rule fails, the daemon skips the rule rather than defaulting to a deny decision, enabling attackers who can trigger DNS failures to bypass module-level IP access controls and gain unauthorized access to restricted module file trees.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  VulnCheck
CVSS-B 9.1 CRITICAL
Vector:  CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 VulnCheck
https://github.com/RsyncProject/rsync/security/advisories/GHSA-6692-28cx-wpqq VulnCheck
https://www.vulncheck.com/advisories/rsync-access-control-bypass-via-dns-resolution-failure VulnCheck

Weakness Enumeration

CWE-ID CWE Name Source
CWE-636 Not Failing Securely ('Failing Open') VulnCheck  
CWE-863 Incorrect Authorization VulnCheck  

Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-70452
NVD Published Date:
08/13/2026
NVD Last Modified:
08/14/2026
Source:
VulnCheck