CVE-2026-87742 quarkus-websockets-next - Denial of Service

quarkus-websockets-next contains a denial of service caused by unbounded message buffering and lack of read backpressure, letting remote attackers exhaust heap space and crash the JVM by streaming messages rapidly.

CVSS base score 7.5 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.76% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Denial of Service
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published
17 September 2026
Updated
15 October 2026
Weakness
CWE-770

Vendor fix

Update to the latest version of quarkus-websockets-next.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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