What is CVE-2026-70452?

CVE-2026-70452 is a high-severity vulnerability in Rsyncproject Rsync, classified under CWE-636. CVSS score: 7.4/10. Published 2026-08-13.

How severe is CVE-2026-70452?

High severity. CVSS v3 base score is 7.4 out of 10.

Auth bypass in Rsyncproject Rsync

CVE-2026-70452

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…

CVSS v3 metric

CVSS v3 base score 7.4 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.

Affected products

Rsyncproject Rsync — versions 3.1.0, 3.5.0

Weakness classification (CWE)

CWE-636
CWE-863 — Incorrect Authorization

References

disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-70452?: CVE-2026-70452 is a high-severity vulnerability in Rsyncproject Rsync, classified under CWE-636. CVSS score: 7.4/10. Published 2026-08-13.
How severe is CVE-2026-70452?: High severity. CVSS v3 base score is 7.4 out of 10.