CVE-2026-15396

IBM WebSphere Application Server IBM WebSphere Application Server - Liberty HTTP Request Smuggling

En bref

Sévérité: MEDIUM 6.5
EPSS: EPSS 0.37 % · centile 30 (2026-10-27)
État: PUBLISHED
Publiée: 2026-09-14
Mise à jour: 2026-10-22
Attribuée par: ibm
Statut NVD: Awaiting Analysis

Description

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.

Scores

Version	Score	Vecteur	Évalué par
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	ibm
CVSS 3.1	MEDIUM 6.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N	NVD · psirt@us.ibm.com (Secondary)

Faiblesses (CWE)

CWE-444

Références européennes

ENISA EUVD · EUVD-2026-78068
GCVE · GCVE-0-2026-15396

Avis du CERT-FR

CERTFR-2026-AVI-1336 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
CERTFR-2026-AVI-1206 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr

Produits affectés

Produit	Versions
IBM · WebSphere Application Server	affected 9.0 ; affected 8.5
IBM · WebSphere Application Server - Liberty	affected 17.0.0.3 ≤ 26.0.0.5

Références

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)	Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD