CVE-2026-87742: Allocation of Resources Without Limits or Throttling in Red Hat Exploit Intelligence
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).
AI Analysis
Technical Summary
The vulnerability in quarkus-websockets-next allows a remote attacker to cause a denial of service by streaming messages faster than the application can process them. The lack of read backpressure and unbounded message buffering exhausts heap space, resulting in a java.lang.OutOfMemoryError that crashes the JVM. This flaw affects the Red Hat Build of Quarkus and can cause service outages. Red Hat has classified this as an important denial of service issue but currently does not have a mitigation or fix that meets their standards for ease of use, applicability, or stability.
Potential Impact
The impact is a high-severity denial of service condition where an attacker can crash the JVM hosting the application by exhausting heap memory. This causes service unavailability but does not affect confidentiality or integrity. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat currently states that no mitigation is available or that existing options do not meet their criteria for deployment and stability. Users should monitor Red Hat advisories for future updates or fixes. No official patch or workaround is currently provided.
CVE-2026-87742: Allocation of Resources Without Limits or Throttling in Red Hat Exploit Intelligence
Description
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).
CVSS v3.1
Score 7.5high
Affected software
Red Hat
Exploit Intelligence
Red Hat
Red Hat build of Quarkus
Red Hat
Red Hat Enterprise Linux AI (RHEL AI) 3
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in quarkus-websockets-next allows a remote attacker to cause a denial of service by streaming messages faster than the application can process them. The lack of read backpressure and unbounded message buffering exhausts heap space, resulting in a java.lang.OutOfMemoryError that crashes the JVM. This flaw affects the Red Hat Build of Quarkus and can cause service outages. Red Hat has classified this as an important denial of service issue but currently does not have a mitigation or fix that meets their standards for ease of use, applicability, or stability.
Potential Impact
The impact is a high-severity denial of service condition where an attacker can crash the JVM hosting the application by exhausting heap memory. This causes service unavailability but does not affect confidentiality or integrity. There are no known exploits in the wild at this time.
Mitigation Recommendations
Red Hat currently states that no mitigation is available or that existing options do not meet their criteria for deployment and stability. Users should monitor Red Hat advisories for future updates or fixes. No official patch or workaround is currently provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-09-09T05:58:00.263Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-87742","vendor":"Red Hat"}]
Threat ID: 6aac00fe55bf5e2cf588eee9
Added to database: 09/17/2026, 15:02:22 UTC
Last enriched: 09/17/2026, 15:16:33 UTC
Last updated: 09/17/2026, 23:35:04 UTC
Views: 8
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