CVE-2026-70456: Rsyncproject Rsync

High severity, CVSS 8.2. EPSS: 0.4% chance of exploitation in the next 30 days.

rsync 3.0.1 before 3.5.0 contains an out-of-bounds write vulnerability in the read_args() function that allows a malicious sender to corrupt adjacent heap memory by sending a crafted argument list. When the argument count causes the argv allocation to be exactly full, the trailing NULL terminator is written one slot beyond the allocation boundary, corrupting adjacent heap memory.

Affected products

• Rsyncproject Rsync: from 3.0.1, up to and including 3.4.4

Published 2026-08-13. Last modified 2026-09-08.