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VulnerabilityPublished Updated

CVE-2026-87742: Red Hat Exploit Intelligence · Unthrottled Resource Allocation

Affects Red Hat Exploit IntelligenceSource CVE Database V5

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Not known to be exploited · CVSS 7.5 High.

Data as of 1 Nov 2026, 22:58 UTC

CVSS 3.1 base score
7.5High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.7% chance of exploitation in 30 days – higher than 55% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 17 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 1 Nov 2026.

What to do

Affected software

ProductAffectedFixed in
Red Hat build of Quarkus 3.27.5.SP2quarkus-websockets-nextAffected–Fixed in–
Red Hat build of Quarkus 3.33.3.SP2quarkus-websockets-nextAffected–Fixed in–
Exploit Intelligenceexploit-intelligence/agent-client-rhel9Affected–Fixed in–
Red Hat Enterprise Linux AI (RHEL AI) 3rhelai3/bootc-cuda-rhel9Affected–Fixed in–
Red Hat Enterprise Linux AI (RHEL AI) 3rhelai3/bootc-gaudi-rhel9Affected–Fixed in–
Red Hat Enterprise Linux AI (RHEL AI) 3rhelai3/bootc-rocm-rhel9Affected–Fixed in–

AI-suggested

Red Hat has released an official security update for Red Hat build of Quarkus 3.27.5.SP2 that addresses this vulnerability. Users should apply the update as per the Red Hat advisory RHSA-2026:69470. Prior to applying this update, ensure all previously released errata relevant to your system have been applied. No additional mitigations are indicated beyond applying the official fix.

Description

A vulnerability in the Red Hat build of Quarkus 3.27.5.SP2's quarkus-websockets-next component allows remote attackers to cause a Denial of Service (DoS) by streaming messages faster than the application can handle. This leads to unbounded message buffering and heap exhaustion, resulting in a java.lang.OutOfMemoryError that crashes the JVM. Red Hat has issued an important security update addressing this and other vulnerabilities in Quarkus 3.27.5.SP2.

References

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