CVE-2026-15634

mediumpriority · track · 26EPSS 0.004 · 30 %ileDEFRUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.37% (30th) EPSS

CVSS 6.5 · medium

Is it mine?

9 products

Check your exposure

Who says so?

2 sources

cert_bund · certfr

EPSS · scored 2026-10-27

IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are vulnerable to HTTP request smuggling, caused by improper parsing of the HTTP transfer-encoding request header. By sending a specially crafted HTTP transfer-encoding request header, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.

cvss

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

6.5

010

base score 0–10 · higher = more severe · hover a vector to decode

v3.16.5mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Nprimary · psirt@us.ibm.com USexploitability 3.9 · impact 2.5

v3.16mediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:Usecondary · CVSS-BT (t0sche)

ssvc

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

Exploitation: none · Automatable: yes · Technical Impact: partialcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-444USCWE-444US

affected products (9)

Products and version ranges known to be affected.

IBM Business Automation Workflowall versionscert_bundDEcpe:/a:ibm:business_automation_workflow:-
IBM Rational ClearQuestall versionscert_bundDEcpe:/a:ibm:rational_clearquest:-
IBM SPSS Analytic Serverall versionscert_bundDEcpe:/a:ibm:spss:analytic_server
IBM TXSeries 8.2all versionscert_bundDEcpe:/a:ibm:txseries:for_multiplatforms_8.2
IBM TXSeries 9.1all versionscert_bundDEcpe:/a:ibm:txseries:for_multiplatforms_9.1
IBM TXSeries for Multiplatforms 10.1all versionscert_bundDEcpe:/a:ibm:txseries:for_multiplatforms_10.1
IBM TXSeries for multiplatforms 11.1all versionscert_bundDEcpe:/a:ibm:txseries:for_multiplatforms_11.1
IBM WebSphere Service Registry and Repositoryall versionscert_bundDEcpe:/a:ibm:websphere_service_registry_and_repository:-
IBM WebSphere Application Server Liberty< 26.0.0.9cert_bundDE

advisories (3)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2026-3255IBM WebSphere Application Server: Mehrere SchwachstellenDeutsch2026-09-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM WebSphere Application Server ausnutzen, um Sicherheitsmaßnahmen zu umgehen, Berechtigungen zu erweitern, vertrauliche Informationen offenzulegen, Daten zu manipulieren, Cross-Site-Scripting-Angriffe durchzuführen oder Denial-of-Service-Zustände herbeizuführen.
WID-SEC-W-2026-3275IBM WebSphere Application Server Liberty: Mehrere SchwachstellenDeutsch2026-09-08csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in IBM WebSphere Application Server Liberty ausnutzen, um einen Denial of Service Angriff durchzuführen, um Sicherheitsvorkehrungen zu umgehen, Daten zu manipulieren und Informationen offenzulegen.
CERTFR-2026-AVI-1336Multiples vulnérabilités dans les produits IBMFrançais2026-10-16vendor · certfrFR

sources

Which sources assert this record, and when.

cert_bund certfr NVD CVE.org MITRE

published 2026-09-14modified 2026-10-22

references (2) nvd

External citations — patches, advisories, analysis.

scry

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