Io.netty/netty-codec-http: netty: unbounded per-connection queue growth in websocketserverextensionhandler leads to denial of service
CVSS score
7.5
EPSS probability
%1.0
Risk score
0.1
Published
24 d ago
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-93558 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-93558 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | Red Hat | Red Hat Build of Apache Camel 3.33.3.SP2 | View |
| 2 | Red Hat | Red Hat build of Quarkus 3.27.5.SP2 | View |
| 3 | Red Hat | Red Hat build of Quarkus 3.33.3.SP2 | View |
| 4 | Red Hat | Red Hat AMQ Broker 7 | View |
| 5 | Red Hat | Red Hat AMQ Clients | View |
| 6 | Red Hat | Red Hat build of Apache Camel 4 for Quarkus 3 | View |
| 7 | Red Hat | Red Hat build of Apache Camel for Spring Boot 4 | View |
| 8 | Red Hat | Red Hat build of Apicurio Registry 3 | View |
| 9 | Red Hat | Red Hat build of Debezium 3 | View |
| 10 | Red Hat | Red Hat Build of Keycloak | View |
| 11 | Red Hat | Red Hat Data Grid 8 | View |
| 12 | Red Hat | Red Hat Fuse 7 | View |
| 13 | Red Hat | Red Hat JBoss Enterprise Application Platform 7 | View |
| 14 | Red Hat | Red Hat JBoss Enterprise Application Platform 8 | View |
| 15 | Red Hat | Red Hat Single Sign-On 7 | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 7.5 | CVSS V3_1 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | CVE CNA |
| 7.5 | CVSS V31 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H | NVD |
Patch and Remediation Guide
Solution & Remediation Advisory
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Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-93558 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-93558 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
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Get this vulnerability through the API
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curl -H "x-api-key: $DAYBREACH_API_KEY" \ "https://api.enginteksut.com.tr/api/v1/intel/cves/CVE-2026-93558"