CVE-2026-8646

criticalpriority · track · 36EPSS 0.006 · 48 %ileDEEUUS

grimoire priorityP2 · Scheduled

Exploitable?

—

no known exploitation

Likely / severe?

0.59% (48th) EPSS

CVSS 9.1 · critical

Is it mine?

35 products

Check your exposure

Who says so?

3 sources

cnnvd · enisa_euvd · cert_bund

EPSS · scored 2026-10-27

IBM WebSphere Application Server 9.0 and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to HTTP request smuggling. A remote attacker could smuggle a specially crafted request to the application server thereby allowing the attacker to bypass security controls, spoof identity, escalate privilege, and expose sensitive information.

cvss

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

9.1

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · high–critical · 7.4–9.1

v3.19.1criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:Nprimary · NVD / NIST USexploitability 3.9 · impact 5.2

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · ENISA EU

v3.17.4highCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:Nsecondary · psirt@us.ibm.com USexploitability 2.2 · impact 5.2

v3.18.3highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444US

affected products (35)

Products and version ranges known to be affected.

HCL BigFix Complianceall versionscert_bundDEcpe:/a:hcltech:bigfix:compliance
IBM Business Automation Workflowall versionscert_bundDEcpe:/a:ibm:business_automation_workflow:-
IBM DevOps Code ClearCase 11.0all versionscert_bundDEcpe:/a:ibm:devops_code_clearcase:11.0
IBM License Metric Toolall versionscert_bundDEcpe:/a:ibm:license_metric_tool:-
IBM MQall versionscert_bundDEcpe:/a:ibm:mq:-
IBM MQ Operatorall versionscert_bundDEcpe:/a:ibm:mq:operator
IBM Rational ClearCase 10.0.0all versionscert_bundDEcpe:/a:ibm:rational_clearcase:10.0.0
IBM Rational ClearCase 9.1all versionscert_bundDEcpe:/a:ibm:rational_clearcase:9.1
IBM Rational ClearQuestall versionscert_bundDEcpe:/a:ibm:rational_clearquest:-
IBM SPSS Analytic Serverall versionscert_bundDEcpe:/a:ibm:spss:analytic_server
IBM TXSeries for multiplatformsall versionscert_bundDEcpe:/a:ibm:txseries:for_multiplatforms
IBM Tivoli Monitoringall versionscert_bundDEcpe:/a:ibm:tivoli_monitoring:-
IBM Tivoli Network Managerall versionscert_bundDEcpe:/a:ibm:tivoli_network_manager:ip_edition
IBM WebSphere Application Server Liberty 17.0.0.3-26.0.0.6all versionscert_bundDEcpe:/a:ibm:websphere_application_server_liberty:17.0.0.3_-_26.0.0.6
IBM WebSphere Application Server Liberty Web Server Plug-ins 8.5all versionscert_bundDEcpe:/a:ibm:websphere_application_server_liberty:8.5::web_server_plug-ins
IBM WebSphere Application Server Liberty Web Server Plug-ins 9.0all versionscert_bundDEcpe:/a:ibm:websphere_application_server_liberty:9.0::web_server_plug-ins
IBM WebSphere Service Registry and Repositoryall versionscert_bundDEcpe:/a:ibm:websphere_service_registry_and_repository:-
IBM iall versionscert_bundDEcpe:/o:ibm:i:-
IBM WebSphere Application Server< 8.5.5.29 PH71370cert_bundDE
IBM WebSphere Application Server< 8.5.5.29 PH71376cert_bundDE

showing 20 of 35

advisories (1)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-2001IBM WebSphere Application Server: Mehrere SchwachstellenDeutsch2026-06-17csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM WebSphere Application Server ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Sicherheitsvorkehrungen zu umgehen, um Informationen offenzulegen, und um seine Privilegien zu erhöhen.

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 CVE.org MITRE

published 2026-06-22modified 2026-06-24

references (3)

External citations — patches, advisories, analysis.

scry

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