JLSEC-2026-101

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Source
https://github.com/JuliaLang/SecurityAdvisories.jl/blob/main/advisories/published/2026/JLSEC-2026-101.md
Import Source
https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-101.json
JSON Data
https://api.osv.dev/v1/vulns/JLSEC-2026-101
Upstream
Published
2026-04-14T13:10:46.494Z
Modified
2026-04-14T13:15:12.000183Z
Summary
[none]
Details

Versions of the package deno before 1.31.0 are vulnerable to Regular Expression Denial of Service (ReDoS) due to the upgradeWebSocket function, which contains regexes in the form of /s*,s*/, used for splitting the Connection/Upgrade header. A specially crafted Connection/Upgrade header can be used to significantly slow down a web socket server.

Database specific 
{
    "license": "CC-BY-4.0",
    "sources": [
        {
            "html_url": "https://nvd.nist.gov/vuln/detail/CVE-2023-26103",
            "modified": "2025-03-11T16:15:14.263Z",
            "id": "CVE-2023-26103",
            "published": "2023-02-25T05:15:12.343Z",
            "imported": "2026-04-14T12:58:54.989Z",
            "url": "https://services.nvd.nist.gov/rest/json/cves/2.0?cveId=CVE-2023-26103"
        }
    ]
}
References

Affected packages

Julia / Deno_jll

Package

Name
Deno_jll
Purl
pkg:julia/Deno_jll?uuid=04572ae6-984a-583e-9378-9577a1c2574d

Affected ranges

Type
SEMVER
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.33.4+0

Database specific

source 
"https://github.com/JuliaLang/SecurityAdvisories.jl/tree/generated/osv/2026/JLSEC-2026-101.json"