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TI-2026-59895 Aliases CVE-2026-87742GHSA-g4x4-8j33-p4h3

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

Priority MEDIUM 40CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 2 fixed, 2 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-770.

Summary

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).

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00759 55th percentileScored 2026-11-07
Fix Partial Red Hat: 2 advisoriesRed Hat: 2 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
Red HatRed Hat build of Quarkus 3.27.5.SP2——Not affectedCNA
Red HatRed Hat build of Quarkus 3.33.3.SP2——Not affectedCNA
Red HatExploit Intelligence——No fix listedCNA
Red HatRed Hat Enterprise Linux AI (RHEL AI) 3——No fix listedCNA
Red HatRed Hat Enterprise Linux AI (RHEL AI) 3——No fix listedCNA
Red HatRed Hat Enterprise Linux AI (RHEL AI) 3——No fix listedCNA
Red HatRed Hat Enterprise Linux AI (RHEL AI) 3——No fix listedCNA
  • Red Hat build of Quarkus 3.27.5.SP2 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Red Hat build of Quarkus 3.33.3.SP2 VendorRed Hat Affected — Fixed in — Not affected CNA
  • Exploit Intelligence VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux AI (RHEL AI) 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux AI (RHEL AI) 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux AI (RHEL AI) 3 VendorRed Hat Affected — Fixed in — No fix listed CNA
  • Red Hat Enterprise Linux AI (RHEL AI) 3 VendorRed Hat Affected — Fixed in — No fix listed CNA

CPE names CNA · 4

CPEVersionsRoleVendor
cpe:/a:redhat:quarkus:3.27::el83.27—Red Hat
cpe:/a:redhat:quarkus:3.33::el83.33—Red Hat
cpe:/a:redhat:exploit_intelligence:00—Red Hat
cpe:/a:redhat:enterprise_linux_ai:33—Red Hat
  • cpe:/a:redhat:quarkus:3.27::el8 Versions 3.27 — ·Red Hat
  • cpe:/a:redhat:quarkus:3.33::el8 Versions 3.33 — ·Red Hat
  • cpe:/a:redhat:exploit_intelligence:0 Versions 0 — ·Red Hat
  • cpe:/a:redhat:enterprise_linux_ai:3 Versions 3 — ·Red Hat

Remediation

Red Hat 2 advisories

  • RHSA-2026:69440 Released 2026-09-21 · Red Hat rating Important
    Red Hat build of Quarkus 3.33.3.SP2 release and security update
    • Red Hat build of Quarkus 3.33.3.SP2
  • RHSA-2026:69470 Released 2026-09-21 · Red Hat rating Important
    Red Hat build of Quarkus 3.27.5.SP2 release and security update
    • Red Hat build of Quarkus 3.27.5.SP2

Vendor assessments

Red Hat

Red Hat rating: Important. Red Hat's page for this CVE →

ProductStatusPlan or fix
Exploit IntelligenceAffectedNo fix yet
Red Hat Enterprise Linux AI (RHEL AI) 3AffectedNo fix yet
Red Hat build of Quarkus 3.27.5.SP2Fixed RHSA-2026:69470
Red Hat build of Quarkus 3.33.3.SP2Fixed RHSA-2026:69440

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-87742
  2. 2026-10-03 Alias added: GHSA-g4x4-8j33-p4h3
  3. 2026-10-09 Fix available: RHSA-2026:69440 · Red Hat
  4. 2026-10-09 Fix available: RHSA-2026:69470 · Red Hat
  5. 2026-10-10 Fix available: Red Hat build of Quarkus 3.27.5.SP2, Red Hat build of Quarkus 3.33.3.SP2 · Red Hat
  6. 2026-10-10 Affected versions changed · CNA

References

Advisory 2

Other 2

  • TI-2019-15875 Protection mechanism failure in Jenkins Pipeline: Groovy Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-15874 Protection mechanism failure in Jenkins Script Security Plugin KEVCVSS 3.1CRITICAL 9.9
  • TI-2019-08259 Underflow in PHP-FPM can lead to RCE KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-05363 Code injection in Elastic Kibana KEVCVSS 3.1CRITICAL 10.0
  • TI-2019-03949 Out-of-bounds write in ESXi and Horizon DaaS KEVCVSS 3.1CRITICAL 9.8
  • TI-2018-16080 A code execution vulnerability exists in the Stapler web framework used by Jenkins 2.153… KEVCVSS 3.1CRITICAL 9.8
See all 7413 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences