JLSEC-2026-1284

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1284.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1284.json

JSON Data

https://api.test.osv.dev/v1/vulns/JLSEC-2026-1284

Upstream

CVE-2021-31810

Published

2026-08-13T09:49:53Z

Modified

2026-08-13T10:00:03Z

Severity

5.0 CVSS_V2 - AV:N/AC:L/Au:N/C:P/I:N/A:N (Source: NVD) CVSS Calculator
5.8 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N (Source: NVD) CVSS Calculator

Summary

[none]

Details

An issue was discovered in Ruby through 2.6.7, 2.7.x through 2.7.3, and 3.x through 3.0.1. A malicious FTP server can use the PASV response to trick Net::FTP into connecting back to a given IP address and port. This potentially makes curl extract information about services that are otherwise private and not disclosed (e.g., the attacker can conduct port scans and service banner extractions).

Database specific

{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "database_specific": {
                "status": "Modified"
            },
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2021-31810",
            "id": "CVE-2021-31810",
            "imported": "2026-08-12T15:35:15.261Z",
            "modified": "2026-06-17T03:52:16.460Z",
            "published": "2021-07-13T13:15:09.243Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-31810"
        }
    ]
}

References

Affected packages

Julia / ruby_jll

Package

Name: ruby_jll
Purl: pkg:julia/ruby_jll?uuid=3ea333e9-fd8a-53ca-adba-366e8551b7d5

Affected ranges

Type: SEMVER
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1284.json"