VULNERABILITY INTELLIGENCE

CVE-2026-70455

CVSS score7.5 HIGH
EPSS probability0.57%
CISA KEVNot currently listed
Published2026-08-13
Last modified2026-10-24
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Description

rsync 3.4.2 before 3.5.0 contains a denial of service vulnerability that allows a remote sender to exhaust system resources by specifying the --zt short alias for --compress-threads, which bypasses the refuse options directive's string matching on long option names. Attackers can specify --zt=N with a large value to spawn an unbounded number of Zstandard worker threads on the receiver, exhausting available thread and memory resources.

Weakness classification

  • disclosure@vulncheck.com: CWE-770

Primary references