CVE-2026-87742CWE-770denial-of-service

CVE-2026-87742

High · published September 17, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
54.8
In the wild
Unconfirmed
What it is

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).

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00759 · 54.8th percentile
Weakness
CWE-770 · Allocation of Resources Without Limits or Throttling
Published
2026-09-17T19:16Z
References (4)
https://access.redhat.com/errata/RHSA-2026:69440 · [email protected]https://access.redhat.com/errata/RHSA-2026:69470 · [email protected]https://access.redhat.com/security/cve/CVE-2026-87742 · [email protected]https://bugzilla.redhat.com/show_bug.cgi?id=2530522 · [email protected]
EPSS history
Timeline
  • 19 SEP 03:54Z
    EPSS moved — → 0%
    epss
  • 17 SEP 14:57Z
    Quarkus-websockets-next: denial of service (oom) in quarkus-websockets-next via unbounded message buffering
    cvelistv5