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CVE-2026-93558.

Source-reported disclosure and enrichment record.

SEVERITY / CVSSHIGH / 7.5CVSS 3.1 · secalert@redhat.com
EXPLOITATION STATUSNot listed in the cached KEV catalogThis does not establish absence of exploitation.
RECORD STATUSAwaiting AnalysisModified Oct 09, 2026

Disclosure summary

A flaw was found in Netty's WebSocketServerExtensionHandler. A remote, unauthenticated attacker can exploit this vulnerability by using HTTP/1.1 pipelining to send requests faster than the application can respond. This leads to an unbounded growth of a per-connection queue, consuming excessive memory. Eventually, this can cause the Java Virtual Machine (JVM) to exhaust its heap, resulting in a Denial of Service (DoS) for the affected server.

Source-reported weakness categories

CWE-1035

Source-specific records & product guidance

Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.

NIST National Vulnerability Database · NVD-CVE-2026-93558

Open original source · Updated Oct 09, 2026

Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.

Original records & references

PUBLISHED 2026-09-18T11:17:19-04:00
MODIFIED 2026-10-09T20:17:05-04:00
INGESTED 2026-10-10T20:50:44-04:00