TI-2026-71807 Aliases CVE-2026-93907 GHSA-wrqm-vfgr-mwmm

Authentication bypass in IBM WebSphere Application Server

LOW 37CWE-287Published 2026-10-13 · Updated 2026-10-14

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: High
Impact type: Security bypass
Confidentiality · integrity · availability: High · High · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

IBM WebSphere Application Server 8.5 and 9.0 are affected. Improper authentication (CWE-287) in the CSIv2 inbound propagation handler lets a remote attacker bypass authentication. The attack needs no privileges or user interaction, but it has high attack complexity.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Description from the CNA

IBM WebSphere Application Server 8.5, and 9.0 could allow a remote attacker to bypass authentication by exploiting a flaw in the CSIv2 inbound propagation handler.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.0034 27th 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: No
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
IBM	WebSphere Application Server	8.5; 9.0	—	No fix listed	CNA

WebSphere Application Server VendorIBM Affected 8.5; 9.0 Fixed in — No fix listed CNA

CPE names CNA · 4

CPE	Versions	Role	Vendor
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: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:*:*:*:*:*:*:* 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:9.0:*:*:*:*:*:*:* Versions 9.0 — ·IBM
cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:* Versions 9.0.0 — ·IBM

Remediation

The sources list no fixed version for IBM WebSphere Application Server.

Written with Claude Haiku 5.5 from the sources below · 2026-10-27

Timeline

2026-10-13 Threatist record created from CVE-2026-93907
2026-10-13 Alias added: GHSA-wrqm-vfgr-mwmm
2026-10-14 CISA SSVC decision points changed

References

Patch 1

https://www.ibm.com/support/pages/node/7292216

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Sources

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