JLSEC-2026-409

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Source
https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-409.md
Import Source
https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-409.json
JSON Data
https://api.osv.dev/v1/vulns/JLSEC-2026-409
Upstream
Published
2026-05-04T13:12:06.605Z
Modified
2026-05-04T13:17:36.713939Z
Summary
[none]
Details

An improper certificate validation vulnerability exists in curl <v8.1.0 in the way it supports matching of wildcard patterns when listed as "Subject Alternative Name" in TLS server certificates. curl can be built to use its own name matching function for TLS rather than one provided by a TLS library. This private wildcard matching function would match IDN (International Domain Name) hosts incorrectly and could as a result accept patterns that otherwise should mismatch. IDN hostnames are converted to puny code before used for certificate checks. Puny coded names always start with xn-- and should not be allowed to pattern match, but the wildcard check in curl could still check for x*, which would match even though the IDN name most likely contained nothing even resembling an x.

Database specific 
{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "id": "CVE-2023-28321",
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-28321",
            "imported": "2026-05-02T08:39:47.120Z",
            "modified": "2025-01-15T16:15:26.203Z",
            "published": "2023-05-26T21:15:16.020Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-28321",
            "database_specific": {
                "status": "Modified"
            }
        }
    ]
}
References

Affected packages

Julia / CURL_jll

Package

Name
CURL_jll
Purl
pkg:julia/CURL_jll?uuid=b21e61f3-bafc-59ac-ab14-4c5c62d6588d

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
8.5.0+0

Database specific

source 
"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-409.json"

Julia / LibCURL_jll

Package

Name
LibCURL_jll
Purl
pkg:julia/LibCURL_jll?uuid=deac9b47-8bc7-5906-a0fe-35ac56dc84c0

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
8.2.1+0

Database specific

source 
"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-409.json"