JLSEC-2026-1377

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1377.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1377.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-1377

Upstream

CVE-2026-73253

EUVD-2026-63500

Published

2026-08-24T13:43:17.899Z

Modified

2026-08-24T14:00:03.437583556Z

Severity

9.1 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator

Summary

[none]

Details

Mongoose is an embedded web server and network library. Prior to version 7.22, an on-path network attacker with a wildcard certificate for a parent domain can impersonate deeper subdomains to a client using the built-in TLS stack. The mg_tls_verify_cert_san() and mg_tls_verify_cert_cn() functions in src/tls_builtin.c call mg_match(), whose wildcard can cross DNS label boundaries, so a pattern such as *.example.com can match foo.bar.example.com. The resulting hostname verification bypass permits interception and modification of TLS traffic. This issue is fixed in version 7.22.

Database specific

{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "database_specific": {
                "status": "Received"
            },
            "published": "2026-08-20T18:16:45.940Z",
            "imported": "2026-08-23T06:20:12.239Z",
            "id": "CVE-2026-73253",
            "modified": "2026-08-20T19:17:01.203Z",
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73253",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-73253"
        },
        {
            "id": "EUVD-2026-63500",
            "published": "2026-08-20T17:41:02Z",
            "affected": {
                "Cesanta:Mongoose": [
                    "< 7.22"
                ]
            },
            "imported": "2026-08-23T06:20:06.545Z",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-63500",
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-63500",
            "modified": "2026-08-20T18:36:17Z"
        }
    ]
}

References

Affected packages

Julia / Mongoose_jll

Package

Name: Mongoose_jll
Purl: pkg:julia/Mongoose_jll?uuid=0a8a3f5b-4c0e-5906-8e29-5b3fee15539c

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1377.json"