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CVE-2026-70455: rsync from 3.4.2 (inclusive), before 3.5.0 (exclusive), 3.4.2 through 3.4.4
CVE-2026-70455. CVSS 3.1 base score 7.5 (HIGH, Vendor/CNA). EPSS 0.00566 (percentile 0.46212), scored 22-Oct-2026.
Affected technology
rsync · from 3.4.2 (inclusive), before 3.5.0 (exclusive)
samba
rsync · 3.4.2 through 3.4.4
RsyncProject
Description’s affected range: before 3.5.0
Component: Not specified by the source
Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required
What an attacker can do
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. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality and integrity impact as none; availability impact as high.
- CWE
- CWE-770
- CCR priority
- 30.1 /100 (P4)
- CVSS 3.1
- 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
- EPSS
- 0.00566 · percentile 0.46212 · 2026-10-22
- KEV
- no
Provenance
- NVD CVE API 2.0 · Source record · observed 2026-10-24 01:40:49.068977+00:00 UTC
Stable permalink: https://cybercodered.org/item/cve-cve-2026-70455.html