ws: Memory exhaustion DoS from tiny fragments and data chunks
Summary
| CVE | CVE-2026-48779 |
|---|---|
| State | PUBLISHED |
| Assigner | GitHub_M |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-06-17 13:20:42 UTC |
| Updated | 2026-07-10 12:17:06 UTC |
| 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. |
Risk And Classification
Primary CVSS: v3.1 7.5 HIGH from ADP
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS: 0.005240000 probability, percentile 0.403300000 (date 2026-06-24)
Problem Types: CWE-400 | CWE-770 | CWE-1050 | CWE-400 CWE-400: Uncontrolled Resource Consumption | CWE-770 CWE-770: Allocation of Resources Without Limits or Throttling | CWE-1050 Excessive Platform Resource Consumption within a Loop
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | ADP | CVSS | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | [email protected] | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | Secondary | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
| 3.1 | CNA | DECLARED | 7.5 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
NoneIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Application | Ws Project | Ws | All | All | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Websockets | Ws | affected >= 1.1.0, < 5.2.5 | Not specified |
| CNA | Websockets | Ws | affected >= 6.0.0, < 6.2.4 | Not specified |
| CNA | Websockets | Ws | affected >= 7.0.0, < 7.5.11 | Not specified |
| CNA | Websockets | Ws | affected >= 8.0.0, < 8.21.0 | Not specified |
| ADP | Red Hat | Cluster Observability Operator 1.5.0 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Developer Hub 1.10 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Developer Hub 1.9 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Discovery 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Dev Spaces 3.29 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Service Mesh 2.6 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Service Mesh 3.1 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Service Mesh 3.2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Service Mesh 3.3 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Service Mesh 3 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Trusted Artifact Signer 1.4 | Not specified | Not specified |
| ADP | Red Hat | Cryostat 4 | Not specified | Not specified |
| ADP | Red Hat | Migration Toolkit For Containers | Not specified | Not specified |
| ADP | Red Hat | Node HealthCheck Operator | Not specified | Not specified |
| ADP | Red Hat | OpenShift Lightspeed | Not specified | Not specified |
| ADP | Red Hat | OpenShift Pipelines | Not specified | Not specified |
| ADP | Red Hat | Red Hat AMQ Broker 7 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Ansible Automation Platform 2 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Apache Camel - HawtIO 4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Podman Desktop | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Podman Desktop - Tech Preview | Not specified | Not specified |
| ADP | Red Hat | Red Hat Connectivity Link 1 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 10 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 8 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux 9 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Enterprise Linux AI RHEL AI 3 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Fuse 7 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Hardened Images | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift AI RHOAI | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Openshift Data Foundation 4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat OpenShift Virtualization 4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Quay 3 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Satellite 6 | Not specified | Not specified |
| ADP | Red Hat | Self-service Automation Portal 2 | Not specified | Not specified |
| ADP | Red Hat | Gatekeeper 3 | Not specified | Not specified |
| ADP | Red Hat | OpenShift Service Mesh 3 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Apache Camel For Spring Boot 4 | Not specified | Not specified |
| ADP | Red Hat | Red Hat Build Of Keycloak | Not specified | Not specified |
| ADP | Red Hat | Red Hat Data Grid 8 | Not specified | Not specified |
| ADP | Red Hat | Red Hat JBoss Enterprise Application Platform 8 | Not specified | Not specified |
| ADP | Red Hat | Red Hat JBoss Enterprise Application Platform Expansion Pack | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:37272 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:33160 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| github.com/websockets/ws/security/advisories/GHSA-96hv-2xvq-fx4p | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | github.com | Exploit, Mitigation, Patch, Vendor Advisory |
| github.com/websockets/ws/commit/86d3e8a5fb0246ed373860c5fbb0de88824a27f7 | [email protected] | github.com | Patch |
| access.redhat.com/errata/RHSA-2026:34342 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:36754 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-48779 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | bugzilla.redhat.com | |
| github.com/websockets/ws/commit/bca91adf15677e47dbe4f959653452727be28b94 | [email protected] | github.com | Patch |
| github.com/websockets/ws/commit/b5372ac67bb97a773727b8e9f5035a8123556d53 | [email protected] | github.com | Patch |
| access.redhat.com/errata/RHSA-2026:33163 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:29197 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| github.com/websockets/ws/commit/fd36cd864fcdf62a08273a99e19a7d975401fee8 | [email protected] | github.com | Patch |
| security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-48779.json | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | security.access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:36820 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:33173 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:33183 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:33155 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:33574 | 0b0ca135-0b70-47e7-9f44-1890c2a1c46c | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| ADP | 2026-06-16T22:01:24.571Z | Reported to Red Hat. |
| ADP | 2026-06-16T21:26:22.537Z | Made public. |
Solutions
ADP: RHSA-2026:34342: Cluster Observability Operator 1.5.0
ADP: RHSA-2026:36754: Red Hat Developer Hub 1.10
ADP: RHSA-2026:33574: Red Hat Developer Hub 1.9
ADP: RHSA-2026:29197: Red Hat Discovery 2
ADP: RHSA-2026:36820: Red Hat OpenShift Dev Spaces 3.29
ADP: RHSA-2026:33155: Red Hat OpenShift Service Mesh 2.6
ADP: RHSA-2026:33163: Red Hat OpenShift Service Mesh 3.1
ADP: RHSA-2026:33173: Red Hat OpenShift Service Mesh 3.2
ADP: RHSA-2026:33183: Red Hat OpenShift Service Mesh 3.3
ADP: RHSA-2026:33160: Red Hat OpenShift Service Mesh 3
ADP: RHSA-2026:37272: Red Hat Trusted Artifact Signer 1.4
Workarounds
ADP: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
There are currently no legacy QID mappings associated with this CVE.