CVE-2026-59898

highpriority · track · 30EPSS 0.004 · 37 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.44% (37th) EPSS

CVSS 7.5 · high

Is it mine?

20 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · cert_bund · nvd

EPSS · scored 2026-10-22

Netty is an asynchronous, event-driven network application framework. Prior to versions 4.1.136.Final and 4.2.16.Final, ab attacker can force WebSocket upgrade via the lax V07 (or V08) handshaker by sending `Sec-WebSocket-Version: 7` and omitting `Connection: Upgrade` / `Upgrade: websocket` headers, completing a protocol switch that a proxy would not recognize as an Upgrade request and enabling HTTP request smuggling / protocol-confusion attacks. This issue has been fixed in versions 4.1.136.Final and 4.2.16.Final.

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

FixedCorivaEnginesick_psirt
Users are recommended to upgrade to version 2026.1.1.

cvss

Technical severity, 0–10. One row per scoring source.

7.5

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–high · 1.7–7.5

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 3.6

v3.17.5highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:Nsecondary · SICK PSIRT DE

v4.06.3mediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:Nsecondary · ENISA EU

v4.06.3mediumCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · security-advisories@github.com

v4.01.7lowCVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USCWE-444USCWE-444US

affected products (20)

Products and version ranges known to be affected.

IBM App Connect Enterprise for Manufactoringall versionscert_bundDEcpe:/a:ibm:app_connect_enterprise:for_manufactoring
IBM DB2all versionscert_bundDEcpe:/a:ibm:db2:-
IBM SPSS Analytic Serverall versionscert_bundDEcpe:/a:ibm:spss:analytic_server
IBM SPSS Modeler 19.0.0.0all versionscert_bundDEcpe:/a:ibm:spss:modeler_19.0.0.0
Red Hat Enterprise Linuxall versionscert_bundDEcpe:/o:redhat:enterprise_linux:-
SUSE Linuxall versionscert_bundDEcpe:/o:suse:suse_linux:-
Open Source Netty< 4.1.136cert_bundDE
Open Source Netty< 4.2.16cert_bundDE
Open Source Open Source Netty <4.1.136< 4.1.136cert_bundDE
Open Source Open Source Netty <4.2.16< 4.2.16cert_bundDE
netty netty≤ < 4.1.136.Finalenisa_euvdEU
netty netty4.2.0.Final, → 4.2.16.Finalenisa_euvdEU
netty netty< 4.1.136nvdUScpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
netty netty4.2.0 → 4.2.16nvdUScpe:2.3:a:netty:netty:*:*:*:*:*:*:*:*
Maven io.netty:netty-codec-http< 4.1.136.FinalosvUSpkg:maven/io.netty/netty-codec-http
Maven io.netty:netty-codec-http4.2.0.Final → 4.2.16.FinalosvUSpkg:maven/io.netty/netty-codec-http
SICK AG CorivaEngine≤ 2026.1.0sick_psirtDE
SICK AG CorivaEngineall versionsfixedsick_psirtDE
SICK AG SICK CorivaEngine 2026.1.1all versionsfixedsick_psirtDE
SICK AG SICK CorivaEngine <=2026.1.0≤ 2026.1.0sick_psirtDE

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2356Netty: Mehrere SchwachstellenDeutsch2026-07-14csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Netty ausnutzen, um Sicherheitsprüfungen zu umgehen, Anfragen oder Header zu manipulieren, Zertifikatsprüfungen zu unterlaufen sowie einen Denial of Service zu verursachen.
sca-2026-0013Vulnerabilities Affecting SICK CorivaEngine2026-09-11csaf · sick_psirtDE
SICK CorivaEngine includes the third-party components Netty and Spring Cloud Gateway that are affected by multiple known vulnerabilities. Under certain conditions, these vulnerabilities could allow remote attackers to perform HTTP request smuggling, cause resource exhaustion, or manipulate forwarded request headers. Successful exploitation may impact the integrity and availability of affected systems. SICK has addressed these vulnerabilities and recommends that customers apply the remediations described in this Security Advisory.
GHSA-4mp9-239f-g9hgNetty: WebSockets V07/V08 handshaker missing Connection/Upgrade validation2026-07-22ghsa · osvUS
## Summary An attacker can force WebSocket upgrade via the lax V07 (or V08) handshaker by sending `Sec-WebSocket-Version: 7` and omitting `Connection: Upgrade` / `Upgrade: websocket` headers, completing a protocol switch that a proxy would not recognize as an Upgrade request and enabling HTTP request smuggling / protocol-confusion attacks.

also known as (3)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd cert_bund nvd osv sick_psirt NVD CVE.org MITRE

published 2026-07-29modified 2026-08-06

references (9)

External citations — patches, advisories, analysis.

scry

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