JLSEC-2026-1376

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1376.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1376.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-1376

Upstream

CVE-2026-73251

EUVD-2026-63494

Published

2026-08-24T13:43:17.899Z

Modified

2026-08-24T14:00:03.406131973Z

Severity

9.3 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/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 7.23, a network attacker can impersonate a TLS server to a Mongoose client configured with a multi-certificate CA bundle. In src/tls_builtin.c, the mg_tls_init() function stores the bundle in tls->ca_bundle_der while tls->ca_der.len remains zero, and mg_tls_recv_cert() uses tls_bundle_find() to accept a Common Name match without calling mg_tls_verify_cert_signature(). A forged self-signed certificate can therefore satisfy hostname and CertificateVerify checks and enable interception, credential disclosure, traffic modification, and malicious responses. This issue is fixed in version 7.23.

Database specific

{
    "sources": [
        {
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73251",
            "database_specific": {
                "status": "Received"
            },
            "published": "2026-08-20T18:16:45.743Z",
            "id": "CVE-2026-73251",
            "modified": "2026-08-20T20:17:46.350Z",
            "imported": "2026-08-23T06:20:36.648Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-73251"
        },
        {
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-63494",
            "modified": "2026-08-20T19:50:32Z",
            "id": "EUVD-2026-63494",
            "published": "2026-08-20T17:34:50Z",
            "affected": {
                "Cesanta:Mongoose": [
                    "< 7.23"
                ]
            },
            "imported": "2026-08-23T06:20:06.544Z",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-63494"
        }
    ],
    "license": "CC-BY-4.0"
}

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-2026-1376.json"