Dashboard / CVE-2026-93558

CVE-2026-93558

HIGH
MEDIUM Priority: 0.09 BB Relevance: 75/100
Published: 2026-09-18 Modified: 2026-11-06 First seen: 2026-11-06 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: None
I: None
A: High

Description

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.

Weakness Classification (1)

References & Advisories (11)

https://access.redhat.com/errata/RHSA-2026:69440
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:69470
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:70257
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:83612
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:95760
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:95761
vendor-advisory x_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:95887
vendor-advisory x_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2536932
issue-tracking x_refsource_REDHAT

Bug Bounty Relevance

75 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

7.5 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS — Exploitation Probability

1.22%
Raw Score 0.012230
Percentile 69.2%
Date 2026-11-13

EPSS Trend

2026-11-13
0.01223
2026-11-12
0.01223
2026-11-10
0.01223
2026-11-09
0.01223
2026-11-08
0.01223
2026-11-07
0.01223
2026-11-06
0.01084
2026-11-05
0.01084

Intelligence Sources

mitre ref →
nvd ref →

External Links