CVE-2026-11541

CRITICAL
INFO Priority: 0.04 BB Relevance: 80/100
Published: 2026-06-30 Modified: 2026-10-25 First seen: 2026-10-29 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction Conf. Impact Integ. Impact

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
S: Unchanged
C: High
I: High
A: High

Description

IBM CICS Transaction Gateway for Multiplatforms 9.1, 9.2, 9.3, and 10.1 IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.

Weakness Classification (1)

Affected Software (3)

VendorProductVersion
ibm websphere_application_server 8.5.0.0 – 8.5.5.31
ibm websphere_application_server 9.0.0.0 – 9.0.5.29
ibm websphere_application_server 17.0.0.3 – 26.0.0.6

Bug Bounty Relevance

80 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

9.8 / 10.0 v3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS — Exploitation Probability

0.42%
Raw Score 0.004170
Percentile 35.9%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00417
2026-10-28
0.00417

Intelligence Sources

nvd ref →