Release Notesrelease notes
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0 CVE-2026-70452
CRITICAL
rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure
Record summary
CVE-2026-70452 has a selected CVSS score of 9.1 (critical).
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.
Description source: CVE List
Affected products and versions
1| Product | Source | Version range | Status |
|---|---|---|---|
Default status: unaffected | CVE List | 3.1.0 to ≤ 3.4.4 | affected |
| 3.5.0 | unaffected |
References
3GitHub Security Advisory (GHSA-6692-28cx-wpqq)Vendor advisory
https://github.com/RsyncProject/rsync/security/advisories/GHSA-6692-28cx-wpqq vulncheck.comThird-party advisory
https://www.vulncheck.com/advisories/rsync-access-control-bypass-via-dns-resolution-failure