CVE-2026-70455
High · 7.5CVSS
7.5
EPSS
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Published
Aug 13, 2026
CISA due date
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The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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