JLSEC-2026-1127

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Source

https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-1127.md

Import Source

https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1127.json

JSON Data

https://api.osv.dev/v1/vulns/JLSEC-2026-1127

Upstream

CVE-2026-33219

Published

2026-08-03T19:08:57.739Z

Modified

2026-08-03T19:15:03.819785440Z

Severity

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

Summary

[none]

Details

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, a malicious client which can connect to the WebSockets port can cause unbounded memory use in the nats-server before authentication; this requires sending a corresponding amount of data. This is a milder variant of CVE-2026-27571. That earlier issue was a compression bomb, this vulnerability is not. Attacks against this new issue thus require significant client bandwidth. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, disable websockets if not required for project deployment.

Database specific

{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33219",
            "database_specific": {
                "status": "Modified"
            },
            "modified": "2026-08-03T13:17:53.537Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2026-33219",
            "imported": "2026-08-03T18:16:27.186Z",
            "id": "CVE-2026-33219",
            "published": "2026-03-25T20:16:32.777Z"
        }
    ]
}

References

Affected packages

Julia / nats_server_jll

Package

Name: nats_server_jll
Purl: pkg:julia/nats_server_jll?uuid=8b1691f7-6002-537d-bdf7-c6203599dc08

Affected ranges

Type: SEMVER
Events: Introduced

0Unknown introduced version / All previous versions are affected

Fixed

2.14.3+0

Database specific

source

"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-1127.json"