CVE-2026-48779: 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, f…
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.
- Published by source
- 2026-06-17
- First seen by Reality Radar
- 2026-10-26
- Last verified
- 2026-10-26
Affected
- Manufacturer
- ws project
- Products
- ws
- Versions
- <5.2.5 <6.2.4 <7.5.11 <8.21.0
- CPE
- cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*
Whether your exact unit is affected depends on the model, serial number and region in the official notice.
What the official notice says
Risk: CVSS 7.5
Is this affecting you?
Add what you own or use and Reality Radar will tell you when official changes match it — with evidence and next steps.
Sources
- NIST National Vulnerability Database Tier A · official published 2026-06-17
Evidence ledger
Every piece of evidence we store is appended to a public hash chain, so later edits are detectable. Anyone can re-verify it.
| Entry | Kind | Observed | Evidence hash | Entry hash |
|---|---|---|---|---|
| #1876 | new | 2026-10-26 | 0425b490fba7…ff2754 | 169e1696f0fa…845af5 |
Chain head: #1913 68d492d71c09…880c23