Detections
Analytics
CVE-2026-48779
high
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.
References
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48779.json
https://github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p
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://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