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Socket.IO: Engine.IO Protocol Revision Mismatch DoS

cve-program · CVE-2026-102599

Published

socket.io

Vendor product

Original vendor version evidence · not evaluated as a NuGet range
{
                    "vendor": "socketio",
                    "product": "socket.io",
                    "versions": [
                        {
                            "version": ">= 6.6.0, < 6.6.10",
                            "status": "affected"
                        }
                    ]
                }

Original source record · Cite this exact observation · Complete original publisher JSON

euvd · EUVD-2026-100462

Published

EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.

Original publisher date fields

datePublished: Oct 13, 2026, 7:05:10 PM

dateUpdated: Oct 17, 2026, 12:39:46 AM

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

nvd · CVE-2026-102599

Published

NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON.

Source analysis status: Awaiting Analysis

Weakness classifications: CWE-248

Original publisher date fields

published: 2026-10-13T19:17:49.037

lastModified: 2026-10-17T02:17:08.197

No normalized affected-package data is projected for this source revision. The original publisher record may contain additional product and version evidence; this does not establish that a package is unaffected.

Original source record · Cite this exact observation · Complete original publisher JSON

osv · GHSA-2gc4-cqfq-p2gv

Published

engine.io

npm

SEMVER · introduced 6.6.0 → fixed 6.6.10

Original source record · Cite this exact observation · Complete original publisher JSON

ChangeIntel

An IT change radar: releases, security, known issues, retirements, documentation changes, and service status from public sources. Every item links to supporting evidence; dates and statuses can change after they are read.

Sources read 9 Nov 06:36 UTC · 275 of 275 readable · 273 fully read · documentation 469/469 current