ws: Memory exhaustion DoS from tiny fragments and data chunks (websockets ws)
At a glance
- Source
- NVD
- EPSS
- EPSS 1.43 % · percentile 73 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- GitHub_M
- NVD status
- Modified
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.
Weaknesses (CWE)
- CWE-400 — Uncontrolled Resource Consumption
- CWE-770 — Allocation of Resources Without Limits or Throttling
- CWE-1050 — Excessive Platform Resource Consumption within a Loop
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
- 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
- https://access.redhat.com/errata/RHSA-2026:48151
- https://access.redhat.com/errata/RHSA-2026:34342
- https://access.redhat.com/errata/RHSA-2026:57590
- https://access.redhat.com/errata/RHSA-2026:66545
- https://access.redhat.com/errata/RHSA-2026:66488
- https://access.redhat.com/errata/RHSA-2026:36754
- https://access.redhat.com/errata/RHSA-2026:33574
- https://access.redhat.com/errata/RHSA-2026:29197
- https://access.redhat.com/errata/RHSA-2026:41928
- https://access.redhat.com/errata/RHSA-2026:65126
- https://access.redhat.com/errata/RHSA-2026:60520
- https://access.redhat.com/errata/RHSA-2026:36820
- 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-2026:56431
- https://access.redhat.com/errata/RHSA-2026:41941
- https://access.redhat.com/errata/RHSA-2026:41944
- https://access.redhat.com/errata/RHSA-2026:56366
- https://access.redhat.com/errata/RHSA-2026:57013
- https://access.redhat.com/errata/RHSA-2026:40984
- https://access.redhat.com/errata/RHSA-2026:37272
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | GitHub_M |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | redhat-SADP |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · security-advisories@github.com (Secondary) |
| CVSS 3.1 | HIGH 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD · 0b0ca135-0b70-47e7-9f44-1890c2a1c46c (Secondary) |
Advisories
- GHSA-96hv-2xvq-fx4p — ws: Memory exhaustion DoS from tiny fragments and data chunks
European references
- ENISA EUVD · EUVD-2026-37504
- GCVE · GCVE-0-2026-48779
CERT-FR advisories
- CERTFR-2026-AVI-1233 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1094 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0934 — Multiples vulnérabilités dans les produits Atlassian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*≥ 1.1.0 < 5.2.5cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*≥ 6.0.0 < 6.2.4cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*≥ 7.0.0 < 7.5.11cpe:2.3:a:ws_project:ws:*:*:*:*:*:node.js:*:*≥ 8.0.0 < 8.21.0
Affected products
| Product | Versions |
|---|---|
| websockets · ws | affected >= 1.1.0, < 5.2.5 ; affected >= 6.0.0, < 6.2.4 ; affected >= 7.0.0, < 7.5.11 ; affected >= 8.0.0, < 8.21.0 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |