CVE-2026-70637

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Source
https://cve.org/CVERecord?id=CVE-2026-70637
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70637.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-70637
Published
2026-08-06T14:15:09Z
Modified
2026-10-08T02:51:43Z
Severity
  • 8.2 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
LightFTP 2.4 Data Race Condition via ABOR Command in ftpserv.c
Details

LightFTP through 2.4 contains multiple data race vulnerabilities in ftpserv.c that allow anonymous attackers to cause undefined behavior by issuing LIST followed by ABOR commands without authentication. The control thread closes data_socket and file_fd descriptors while worker threads concurrently operate on the same fields in worker_thread_cleanup, allowing stale file descriptors to be reassigned by the OS and subsequently used by worker threads on unrelated resources, resulting in potential denial of service.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-820"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/70xxx/CVE-2026-70637.json",
    "unresolved_ranges": [
        {
            "extracted_events": [
                {
                    "last_affected": "2.4"
                }
            ],
            "source": "AFFECTED_FIELD"
        }
    ]
}
References

Affected packages

Git / github.com/hfiref0x/LightFTP

Affected ranges

Type
GIT
Repo
https://github.com/hfiref0x/LightFTP
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last Affected
d28c5e08aa4bd128737d35cc6ee0f9630a910ed5

Affected versions

v1.*
v1.0
v1.1
v2.*
v2.0
v2.1
v2.2
v2.3
v2.3.1

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-70637.json"