JLSEC-2026-1380

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1380.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1380.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-1380

Upstream

CVE-2026-73256

EUVD-2026-63497

Published

2026-08-24T13:43:17.899Z

Modified

2026-08-24T14:00:03.434021661Z

Severity

9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator

Summary

[none]

Details

Mongoose is an embedded web server and network library. Prior to 7.22, a remote unauthenticated attacker can exploit an HTTP/1.0 reverse-proxy deployment by sending a request with Transfer-Encoding: chunked and conflicting framing. The http_cb() function in src/http.c tests hm.proto.len with an impossible greater-than-eight condition even though mg_http_parse() requires an eight-byte protocol string, so is_http_1_0 is never set. Mongoose consequently processes chunked encoding that an HTTP/1.0 proxy can ignore, enabling request smuggling and unauthorized access or state changes. This issue is fixed in version 7.22.

Database specific

{
    "sources": [
        {
            "imported": "2026-08-23T06:21:07.087Z",
            "published": "2026-08-20T18:16:46.523Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-73256",
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73256",
            "modified": "2026-08-21T22:16:44.713Z",
            "database_specific": {
                "status": "Received"
            },
            "id": "CVE-2026-73256"
        },
        {
            "published": "2026-08-20T17:37:54Z",
            "affected": {
                "Cesanta:Mongoose": [
                    "< 7.22"
                ]
            },
            "html_url": "https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-63497",
            "imported": "2026-08-23T06:20:06.544Z",
            "modified": "2026-08-21T21:46:47Z",
            "url": "https://euvdservices.enisa.europa.eu/api/enisaid?id=EUVD-2026-63497",
            "id": "EUVD-2026-63497"
        }
    ],
    "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-2026-1380.json"