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    CVE-2026-15634

    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.

    Published:Sep 14, 2026
    Last Modified:Oct 22, 2026
    EPS:Sep 14, 2026
    EPSS Score:0.00252
    CVSS Score:6.5

    Affected Products

    Vendor
    Ibm
    Product
    Websphere Application Server
    Vendor
    Ibm
    Product
    Websphere Application Server Liberty

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    CAPEC-273 HTTP Response Smuggling
    CAPEC-33 HTTP Request Smuggling

    Related CVEs

    CVE-2026-93905 (CVSS 8.2) — IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 could allow an unauthenticated remote at…
    CVE-2026-93909 (CVSS 9.1) — IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 is vulnerable by an authentication bypas…
    CVE-2026-93895 (CVSS 9.1) — IBM WebSphere Application Server - Liberty 20.0.0.12 through 26.0.0.10 could allow an unauthenticated remote a…
    CVE-2026-95695 (CVSS 7.4) — IBM WebSphere Application Server - Liberty 20.0.0.12 through 26.0.0.10 could allow a remote attacker to bypass…
    CVE-2026-95696 (CVSS 6.5) — IBM WebSphere Application Server - Liberty 20.0.0.12 through 26.0.0.10 could allow a remote attacker to cause …
    CVE-2026-101294 (CVSS 8.7) — IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 and IBM WebSphere Application Server 8.5…
    CVE-2026-105442 (CVSS 7.5) — IBM WebSphere Application Server 8.5, and 9.0 and IBM WebSphere Application Server - Liberty 17.0.0.3 through …
    CVE-2026-93907 (CVSS 8.1) — IBM WebSphere Application Server 8.5, and 9.0 could allow a remote attacker to bypass authentication by exploi…
    CVE-2026-95680 (CVSS 8) — IBM WebSphere Application Server 8.5, and 9.0 could allow an authenticated attacker to bypass authorization le…
    CVE-2026-103499 (CVSS 7.5) — IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.10 and IBM WebSphere Application Server 8.5…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High