CVE-2026-45232: Samba Rsync

Low severity, CVSS 3.7. EPSS: 0.3% chance of exploitation in the next 30 days.

Rsync versions before 3.4.3 contain an off-by-one out-of-bounds stack write vulnerability in the establish_proxy_connection() function in socket.c that allows network attackers to corrupt stack memory by sending a malformed HTTP proxy response. Attackers can exploit this by positioning themselves between the client and proxy or controlling the proxy server to send a response line of 1023 or more bytes without a newline terminator, causing a null byte to be written to an out-of-bounds stack address when the RSYNC_PROXY environment variable is set.

Affected products

• Samba Rsync: before 3.4.3 (fixed in 3.4.3)

Published 2026-05-20. Last modified 2026-07-24.