CVE detail
CVE-2026-43617
Rsync version 3.4.2 and prior contain an authorization bypass vulnerability in the rsync daemon's hostname-based access control list enforcement when configured with chroot. Attackers can bypass hostname-based deny rules by controlling the PTR record for their source IP address, allowing connections from hostnames that administrators intended to deny when reverse DNS resolution fails and defaults to UNKNOWN.
Buzz score
Why this CVE is surfacing
This all-time snapshot uses the same composite formula as Trending across a 30-year evidence window, rather than a current rolling window.
Buzz score components · mention 16.1 · diversity 11.5 · KEV 0.0 · OTX 0.0 · PoC 0.0
Why it matters now
Mention timeline
- Total mentions
- 0
- within the 30d window
- Peak daily
- 0
- highest bucket
Evidence
Source links by recency
4 source links · newest first
Information published.
vendormsrc.microsoft.comMay 21, 2026, 8:01 AM- https://www.vulncheck.com/advisories/rsync-authorization-bypass-via-hostname-resolutionwww.vulncheck.com
No excerpt available.
Exploitwww.vulncheck.comMay 20, 2026, 2:16 AM No excerpt available.
Exploitgithub.comMay 20, 2026, 2:16 AMNo excerpt available.
Exploitgithub.comMay 20, 2026, 2:16 AM
Exploit code
Public exploit repository references
Public PoC repositories are third-party, potentially unsafe artifacts. Treat their code as untrusted and use it only on authorized systems in an isolated, least-privilege environment. cvebuzz does not execute the code or verify that an exploit works.
0 repository references · best confidence N/A · max 0 stars
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