JLSEC-2026-1285

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1285.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1285.json

JSON Data

https://api.test.osv.dev/v1/vulns/JLSEC-2026-1285

Upstream

CVE-2021-32066

Published

2026-08-13T09:49:53Z

Modified

2026-08-13T10:00:03Z

Severity

5.8 CVSS_V2 - AV:N/AC:M/Au:N/C:P/I:P/A:N (Source: NVD) CVSS Calculator
7.4 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/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. Net::IMAP does not raise an exception when StartTLS fails with an an unknown response, which might allow man-in-the-middle attackers to bypass the TLS protections by leveraging a network position between the client and the registry to block the StartTLS command, aka a "StartTLS stripping attack."

Database specific

{
    "license":  "CC-BY-4.0",
    "sources":  [
        {
            "database_specific":  {
                "status":  "Modified"
            },
            "html_url":  "https://nvd.nist.gov/vuln/detail/CVE-2021-32066",
            "id":  "CVE-2021-32066",
            "imported":  "2026-08-12T15:35:15.379Z",
            "modified":  "2026-06-17T03:52:44.373Z",
            "published":  "2021-08-01T19:15:07.697Z",
            "url":  "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2021-32066"
        }
    ]
}

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-2026-1285.json"