Authentication Bypass by Alternate Name Affecting rsync package, versions [0,]
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-RSYNC-16770254
- published20 May 2026
- disclosed20 May 2026
- creditMegaManSec
Introduced: 20 May 2026
CVE-2026-43617 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Authentication Bypass by Alternate Name via the hostname-based access control list enforcement process when configured with chroot. An attacker can gain unauthorized access by manipulating the PTR record for their source IP address, thereby circumventing hostname-based deny rules through reverse DNS resolution failures that default to UNKNOWN.