CVE catalog
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, 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
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.81% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | node-ws | sid | 8.21.3+~cs14.19.1-1 | fixed |
| Debian | node-ws | forky | 8.21.3+~cs14.19.1-1 | fixed |
| Debian | node-ws | trixie | 8.18.1+~cs14.18.2-1 | vulnerable |
| Debian | node-ws | bookworm | 8.11.0+~cs13.7.3-1 | vulnerable |
| Cpe | node-ws | Not reported | Not reported | vulnerable |
| Cpe | ws | Not reported | 5.2.5 | fixed |
| Cpe | ws | Not reported | 6.2.4 | fixed |
| Cpe | ws | Not reported | 7.5.11 | fixed |
| Cpe | ws | Not reported | 8.21.0 | fixed |
| Npm | ws | Not reported | 8.21.0 | fixed |
| Npm | ws | Not reported | 6.2.4 | fixed |
| Npm | ws | Not reported | 7.5.11 | fixed |
| Npm | ws | Not reported | 8.21.0 | fixed |
| Cpe | ws | Not reported | 8.21.0 | fixed |
| Opensuse | python-bqplot | tumbleweed | 0.13.1-15.1 | fixed |
| Opensuse | python-ipympl | tumbleweed | 0.10.0-18.1 | fixed |
| Opensuse | python-pydata-sphinx-theme | leap 16.0 | 0.16.1-bp160.2.1 | fixed |
| Opensuse | python-jupyterlab-templates | tumbleweed | 0.5.3-2.1 | fixed |
| Opensuse | python-jupyter-ydoc | tumbleweed | 3.5.0-1.1 | fixed |
| Opensuse | python-nbclassic | tumbleweed | 1.3.3-2.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | node-ws | source | sid | 8.21.0+~cs14.19.1-1 | not yet assigned | Not reported | [1140429] |
| Debian | node-ws | source | forky | 8.21.0+~cs14.19.1-1 | not yet assigned | Not reported | [1140429] |
| Debian | node-ws | source | trixie | (unfixed) | not yet assigned | Not reported | [1140429] |
| Debian | node-ws | source | bookworm | (unfixed) | not yet assigned | Not reported | [1140429] |
| Cpe | ws | cpe | Not reported | 5.2.5 | Not reported | Not reported | Not reported |
| Cpe | ws | cpe | Not reported | 6.2.4 | Not reported | Not reported | Not reported |
| Cpe | ws | cpe | Not reported | 7.5.11 | Not reported | Not reported | Not reported |
| Cpe | ws | cpe | Not reported | 8.21.0 | Not reported | Not reported | Not reported |
| Npm | ws | npm | Not reported | 8.21.0 | Not reported | GHSA-96HV-2XVQ-FX4P | Not reported |
| Npm | ws | npm | Not reported | 6.2.4 | Not reported | Not reported | Not reported |
| Npm | ws | npm | Not reported | 7.5.11 | Not reported | Not reported | Not reported |
| Npm | ws | npm | Not reported | 8.21.0 | Not reported | Not reported | Not reported |
| Cpe | ws | cpe | Not reported | 8.21.0 | Not reported | NVD-CVE-2026-48779 | Not reported |
| Opensuse | python-bqplot | rpm | tumbleweed | 0.13.1-15.1 | Not reported | OPENSUSE-SU-2026:11397-1 | Not reported |
| Opensuse | python-ipympl | rpm | tumbleweed | 0.10.0-18.1 | Not reported | OPENSUSE-SU-2026:11354-1 | Not reported |
| Opensuse | python-pydata-sphinx-theme | rpm | leap 16.0 | 0.16.1-bp160.2.1 | Not reported | OPENSUSE-SU-2026:21173-1 | Not reported |
| Opensuse | python-jupyterlab-templates | rpm | tumbleweed | 0.5.3-2.1 | Not reported | OPENSUSE-SU-2026:11138-1 | Not reported |
| Opensuse | python-jupyter-ydoc | rpm | tumbleweed | 3.5.0-1.1 | Not reported | OPENSUSE-SU-2026:11137-1 | Not reported |
| Opensuse | python-nbclassic | rpm | tumbleweed | 1.3.3-2.1 | Not reported | OPENSUSE-SU-2026:11123-1 | Not reported |
Notes
[trixie] node-ws: Minor issue [bookworm] node-ws: Minor issue; memory-exhaustion DoS from a malicious peer, fixed in 8.21.0/7.5.11
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [node-ws]Affected
Details (2)
8.11.0+~cs13.7.3-1· all · bookwormAffected
nvd · node-ws · debian · bookworm; nvd · node-ws · debian · 12
8.11.0+~cs13.7.3-1· all · bookwormAffected
nvd · node-ws · debian · bookworm; nvd · node-ws · debian · 12
[Debian 13 (Trixie)]
- [node-ws]Affected
Details (2)
8.18.1+~cs14.18.2-1· all · trixieAffected
nvd · node-ws · debian · 13
8.18.1+~cs14.18.2-1· all · trixieAffected
nvd · node-ws · debian · 13
[openSUSE Tumbleweed]
- [jupyter-bqplot-jupyterlab]Unknown
Source package: [python-bqplot]
Details (1)
0.5.46-15.1· noarch · tumbleweedUnknown · Fixed:
0.13.1-15.1Version impact unknown
nvd · python-bqplot · opensuse · tumbleweed
- [jupyter-bqplot-notebook]Unknown
Source package: [python-bqplot]
Details (1)
0.5.46-15.1· noarch · tumbleweedUnknown · Fixed:
0.13.1-15.1Version impact unknown
nvd · python-bqplot · opensuse · tumbleweed
- [jupyter-jupyterlab-templates]Unknown
Source package: [python-jupyterlab-templates]
Details (1)
0.5.3-2.3· noarch · tumbleweedUnknown · Fixed:
0.5.3-2.1Version impact unknown
nvd · python-jupyterlab-templates · opensuse · tumbleweed
- [jupyter-matplotlib]Unknown
Source package: [python-ipympl]
Details (1)
0.11.7-18.1· noarch · tumbleweedUnknown · Fixed:
0.10.0-18.1Version impact unknown
nvd · python-ipympl · opensuse · tumbleweed
- [jupyter-matplotlib-jupyterlab]Unknown
Source package: [python-ipympl]
Details (1)
0.11.7-18.1· noarch · tumbleweedUnknown · Fixed:
0.10.0-18.1Version impact unknown
nvd · python-ipympl · opensuse · tumbleweed
- [jupyter-nbclassic]Unknown
Source package: [python-nbclassic]
Details (1)
1.3.3-2.3· noarch · tumbleweedUnknown · Fixed:
1.3.3-2.1Version impact unknown
nvd · python-nbclassic · opensuse · tumbleweed
- [python313-bqplot]Unknown
Source package: [python-bqplot]
Details (1)
0.13.1-15.1· noarch · tumbleweedUnknown · Fixed:
0.13.1-15.1Version impact unknown
nvd · python-bqplot · opensuse · tumbleweed
- [python313-ipympl]Unknown
Source package: [python-ipympl]
Details (1)
0.10.0-18.1· noarch · tumbleweedUnknown · Fixed:
0.10.0-18.1Version impact unknown
nvd · python-ipympl · opensuse · tumbleweed
- [python313-jupyterlab-templates]Unknown
Source package: [python-jupyterlab-templates]
Details (1)
0.5.3-2.3· noarch · tumbleweedUnknown · Fixed:
0.5.3-2.1Version impact unknown
nvd · python-jupyterlab-templates · opensuse · tumbleweed
- [python313-jupyter-ydoc]Unknown
Source package: [python-jupyter-ydoc]
Details (1)
3.5.0-1.3· noarch · tumbleweedUnknown · Fixed:
3.5.0-1.1Version impact unknown
nvd · python-jupyter-ydoc · opensuse · tumbleweed
- [python313-nbclassic]Unknown
Source package: [python-nbclassic]
Details (1)
1.3.3-2.3· noarch · tumbleweedUnknown · Fixed:
1.3.3-2.1Version impact unknown
nvd · python-nbclassic · opensuse · tumbleweed
- [python314-bqplot]Unknown
Source package: [python-bqplot]
Details (1)
0.13.1-15.1· noarch · tumbleweedUnknown · Fixed:
0.13.1-15.1Version impact unknown
nvd · python-bqplot · opensuse · tumbleweed
- [python314-ipympl]Unknown
Source package: [python-ipympl]
Details (1)
0.10.0-18.1· noarch · tumbleweedUnknown · Fixed:
0.10.0-18.1Version impact unknown
nvd · python-ipympl · opensuse · tumbleweed
- [python314-jupyterlab-templates]Unknown
Source package: [python-jupyterlab-templates]
Details (1)
0.5.3-2.3· noarch · tumbleweedUnknown · Fixed:
0.5.3-2.1Version impact unknown
nvd · python-jupyterlab-templates · opensuse · tumbleweed
- [python314-jupyter-ydoc]Unknown
Source package: [python-jupyter-ydoc]
Details (1)
3.5.0-1.3· noarch · tumbleweedUnknown · Fixed:
3.5.0-1.1Version impact unknown
nvd · python-jupyter-ydoc · opensuse · tumbleweed
- [python314-nbclassic]Unknown
Source package: [python-nbclassic]
Details (1)
1.3.3-2.3· noarch · tumbleweedUnknown · Fixed:
1.3.3-2.1Version impact unknown
nvd · python-nbclassic · opensuse · tumbleweed
Observed:
References
- [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://ftp.suse.com/pub/projects/security/csaf/opensuse-su-2026_11452-1.json]
- [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://nvd.nist.gov/vuln/detail/CVE-2026-48779]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-48779]
- [https://osv.dev/vulnerability/GHSA-96hv-2xvq-fx4p]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11123-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11137-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11138-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11354-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:11397-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:21173-1]
- [https://security-tracker.debian.org/tracker/CVE-2026-48779]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48779.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2460.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]