SB2026100526 - Denial of service in Quarkus

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Main Vulnerability Database SB2026100526

SB2026100526 - Denial of service in Quarkus

Published: October 5, 2026

Security Bulletin ID SB2026100526
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Denial of service

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-87742)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to cause a denial of service by exhausting heap memory and crashing the JVM.

The vulnerability exists due to allocation of resources without limits or throttling in the quarkus-websockets-next WebSocket endpoint's inbound MPSC queue when processing inbound WebSocket messages. A remote attacker can stream messages over a single connection faster than the application's handler can process them to cause a denial of service by exhausting heap memory and crashing the JVM.


Remediation

Install update from vendor's website.

References