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Quarkus-websockets-next: denial of service (oom) in quarkus-websockets-next via unbounded message buffering

Type: advisorySource: Official CVE List1 source record

A flaw was found in quarkus-websockets-next. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by streaming messages over a single connection faster than the application can process them. Due to unbounded message buffering and a lack of read backpressure, this rapidly exhausts heap space, leading to a java.lang.OutOfMemoryError that crashes the Java Virtual Machine (JVM).

Announced Source revision 1
Original source ↗

CVE-2026-87742

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-87742

Red Hat build of Quarkus 3.27.5.SP2

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat build of Quarkus 3.33.3.SP2

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Exploit Intelligence

Source reference: /containers/cna/affected/2/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat Enterprise Linux AI (RHEL AI) 3

Source reference: /containers/cna/affected/3/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat Enterprise Linux AI (RHEL AI) 3

Source reference: /containers/cna/affected/4/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat Enterprise Linux AI (RHEL AI) 3

Source reference: /containers/cna/affected/5/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Red Hat Enterprise Linux AI (RHEL AI) 3

Source reference: /containers/cna/affected/6/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "cpes": [
      "cpe:/a:redhat:quarkus:3.27::el8"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat build of Quarkus 3.27.5.SP2",
    "packageName": "quarkus-websockets-next",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "defaultStatus": "unaffected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:quarkus:3.33::el8"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat build of Quarkus 3.33.3.SP2",
    "packageName": "quarkus-websockets-next",
    "collectionURL": "https://access.redhat.com/jbossnetwork/restricted/listSoftware.html",
    "defaultStatus": "unaffected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:exploit_intelligence:0"
    ],
    "vendor": "Red Hat",
    "product": "Exploit Intelligence",
    "packageName": "exploit-intelligence/agent-client-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:enterprise_linux_ai:3"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "packageName": "rhelai3/bootc-cuda-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:enterprise_linux_ai:3"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "packageName": "rhelai3/bootc-gaudi-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:enterprise_linux_ai:3"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "packageName": "rhelai3/bootc-rocm-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  },
  {
    "cpes": [
      "cpe:/a:redhat:enterprise_linux_ai:3"
    ],
    "vendor": "Red Hat",
    "product": "Red Hat Enterprise Linux AI (RHEL AI) 3",
    "packageName": "rhelai3/disk-image-cuda-rhel9",
    "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-87742

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#16333 · Revision 1
Added to Heist Feed
Publisher date
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