CVE-2026-70455

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Source
https://cve.org/CVERecord?id=CVE-2026-70455
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70455.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-70455
Aliases
  • GHSA-rjvj-qgqg-cvx9
Downstream
Related
Published
2026-08-13T14:45:11Z
Modified
2026-09-10T18:26:51Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
rsync 3.4.2 < 3.5.0 DoS via --zt Zstandard Compression Thread Exhaustion
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70455.json"
}
References

Affected packages

Git / git.samba.org/rsync.git/

Affected ranges

Type
GIT
Repo
https://git.samba.org/rsync.git/
Events
Introduced
de3cc03b03be153092f266aa1117b4706947ed07
Fixed
471e17dc0d68233db84db11be82c9f62f4661214
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.4.2"
        },
        {
            "fixed": "3.5.0"
        }
    ],
    "source": "CPE_RANGE"
}
Type
GIT
Repo
https://github.com/rsyncproject/rsync
Events
Introduced
de3cc03b03be153092f266aa1117b4706947ed07
Fixed
471e17dc0d68233db84db11be82c9f62f4661214
Database specific
Show details 
{
    "cpe": "cpe:2.3:a:samba:rsync:*:*:*:*:*:*:*:*",
    "extracted_events": [
        {
            "introduced": "3.4.2"
        },
        {
            "last_affected": "3.4.4"
        },
        {
            "fixed": "3.5.0"
        }
    ],
    "source": [
        "AFFECTED_FIELD",
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

v3.*
v3.4
v3.4.2
v3.4.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70455.json"