# CVE-2026-70452

## Summary

- **CVE ID:** CVE-2026-70452
- **Severity:** CRITICAL
- **CVSS Score:** 9.1 (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)
- **CWE:** CWE-863, CWE-636
- **Published:** Aug 13, 2026
- **Last Modified:** Aug 14, 2026

## 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.

## Affected Products

- RsyncProject — rsync (3.1.0)
- RsyncProject — rsync (3.5.0)

## References

- [CNA](https://github.com/RsyncProject/rsync/security/advisories/GHSA-6692-28cx-wpqq)
- [CNA](https://github.com/RsyncProject/rsync/releases/tag/v3.5.0)
- [CNA](https://www.vulncheck.com/advisories/rsync-access-control-bypass-via-dns-resolution-failure)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.46%
- **EPSS Percentile:** 38.5

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._