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Netty EUVDEUVD-2026-82979

| CVE-2026-93573 MEDIUM
HTTP Request/Response Smuggling (CWE-444)
2026-09-18 redhat GHSA-xvf3-842c-j48x
Authentication Bypass Java Request Smuggling Red Hat Build Of Keycloak Red Hat Fuse 7 Red Hat Jboss Enterprise Application Platform 8 Red Hat Single Sign On 7 Red Hat Build Of Apache Camel For Spring Boot 4 Red Hat Data Grid 8 Red Hat Jboss Enterprise Application Platform 7 Netty Red Hat Build Of Apache Camel 4 For Quarkus 3 Red Hat Build Of Apicurio Registry 3 Red Hat Build Of Debezium 3 Red Hat Build Of Quarkus Red Hat Amq Broker 7 Red Hat Red Hat Amq Clients
6.5
CVSS 3.1 · Vendor: redhat
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Severity by source

Vendor (redhat) PRIMARY
6.5 MEDIUM
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
vuln.today AI
5.4 MEDIUM

Remote unauthenticated (AV:N/PR:N), but requires a proxy/backend TE-parsing disagreement (AC:H); smuggled requests cross to other users/front-end controls (S:C) with limited confidentiality/integrity impact.

3.1 AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
4.0 AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N

Primary rating from Vendor (redhat).

CVSS VectorVendor: redhat

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None

Lifecycle Timeline

4
Metadata Corrected
Sep 18, 2026 - 15:40 vuln.today
tag: Java added
Metadata Corrected
Sep 18, 2026 - 15:40 vuln.today
tag: Netty added
Analysis Generated
Sep 18, 2026 - 15:21 vuln.today
CVE Published
Sep 18, 2026 - 14:44 cve.org
MEDIUM 6.5

DescriptionCVE.org

Netty split Transfer-Encoding fields bypass final-chunked validation and enable request smuggling

AnalysisAI

This is a real but moderate-priority vulnerability whose severity depends almost entirely on deployment topology rather than the raw 6.5 CVSS score. Netty's HTTP decoder lets split or duplicated Transfer-Encoding header fields slip past its final-chunked validation, so an unauthenticated, remote attacker who can send a raw crafted request to a Netty listener that sits in an HTTP chain with a second HTTP parser (reverse proxy, load balancer, CDN, WAF, or upstream/downstream server) can desynchronize the two parsers and smuggle a request (CWE-444). …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires that the Netty HTTP decoder is deployed in an HTTP chain alongside a second HTTP parser (a reverse proxy, load balancer, CDN, WAF, or upstream/downstream server) that interprets split or duplicated Transfer-Encoding header fields differently from Netty - this parser disagreement is the load-bearing precondition without which no smuggling occurs. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment This is a real but moderate-priority vulnerability whose severity depends almost entirely on deployment topology rather than the raw 6.5 CVSS score. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Patch status: no vendor-released patch or fixed Netty version is identified in the provided data, so monitor https://access.redhat.com/security/cve/CVE-2026-93573 and Bugzilla 2536964 and upgrade to the first fixed Netty build Red Hat ships for each affected product. … Detailed patch versions, workarounds, and compensating controls in full report.
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EUVD-2026-82979 vulnerability details – vuln.today
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