High 7.4Published Aug 13, 2026

CVE-2026-70452rsync 3.1.0 < 3.5.0 Access Control Bypass via DNS Resolution Failure

Updated under an hour ago (2026-10-19 07:23 UTC)

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It affects RsyncProject rsync. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for RsyncProject rsync

Exploited in the last 30 days

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.

CVSS: 7.4 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-863, CWE-636
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Aug 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

RsyncProject rsync rsyncproject:rsync (from the name)	from 3.1.0 through 3.4.4; 3.5.0 not affected	CNA record

References

https://github.com/RsyncProject/rsync/security/advisories/GHSA-6692-28cx-wpqqvendor-advisory
https://github.com/RsyncProject/rsync/releases/tag/v3.5.0release-notes
https://www.vulncheck.com/advisories/rsync-access-control-bypass-via-dns-resolution-failurethird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.