Read the docs
TI-2026-12956 Aliases CVE-2026-15396GHSA-2fc8-vf8h-jfvw

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

Priority LOW 35CWE-444Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
—
Confidentiality · integrity · availability
Low · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00367 30th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
IBMWebSphere Application Server9.0; 8.5—No fix listedCNA
IBMWebSphere Application Server - Liberty17.0.0.3 – 26.0.0.5—No fix listedCNA
  • WebSphere Application Server VendorIBM Affected 9.0; 8.5 Fixed in — No fix listed CNA
  • WebSphere Application Server - Liberty VendorIBM Affected 17.0.0.3 – 26.0.0.5 Fixed in — No fix listed CNA

CPE names CNA · 6

CPEVersionsRoleVendor
cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*9.0—IBM
cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:*9.0.0—IBM
cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*8.5—IBM
cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*8.5.0—IBM
cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*17.0.0.3—IBM
cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.8:*:*:*:*:*:*:*26.0.0.8—IBM
  • cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:* Versions 9.0 — ·IBM
  • cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:* Versions 9.0.0 — ·IBM
  • cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:* Versions 8.5 — ·IBM
  • cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:* Versions 8.5.0 — ·IBM
  • cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:* Versions 17.0.0.3 — ·IBM
  • cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.8:*:*:*:*:*:*:* Versions 26.0.0.8 — ·IBM

Remediation

No fixed version listed by the sources yet.

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    IBM WebSphere Application Server, WebSphere Application Server - Liberty — ibm.com/support/pages/node/7286611

    7 records Highest priority Priority LOW 7 LOW

    Other records, highest priority first

    • TI-2026-13154 IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Request SmugglingPriority LOW 35
    • TI-2026-12968 IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Open RedirectPriority LOW 35
    • TI-2026-09974 IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Improper Access ControlPriority LOW 35
    Show all 7 records → Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-15396
  2. 2026-10-03 Alias added: GHSA-2fc8-vf8h-jfvw
  3. 2026-10-22 Title updated · CNA
  4. 2026-10-22 Affected versions changed · CNA
  5. 2026-10-22 1 new reference · CNA

References

Patch 2

  • TI-2026-08085 Unauthenticated Remote Code Execution via Auto-Login Bypass and Code Validation KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-23774 IBM Aspera Faspex code execution KEVCVSS 3.1CRITICAL 9.8
  • TI-2020-03794 Improper authentication in IBM Data Risk Manager KEVCVSS 3.1CRITICAL 9.8
  • TI-2019-03441 Code injection in IBM Planning Analytics KEVCVSS 3.1CRITICAL 9.8
  • TI-2017-03639 Improper handling of exceptional conditions in Apache Struts KEVCVSS 3.1CRITICAL 9.8
  • TI-2015-06198 Serialized-object interfaces in certain IBM analytics, business solutions, cognitive, IT… KEVCVSS 3.1CRITICAL 9.8
See all 9711 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences