---
id: "CVE-2026-17190"
page: "https://infrastack.ai/live/CVE-2026-17190"
kind: "vulnerability"
aliases: ["CVE-2026-17190"]
title: "IBM API Connect: stored XSS in provider-supplied HTML runs scripts"
severity: "high"
cvss: 8.7
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: [{"name": "API Connect", "fixed": ["10.0.8.13", "12.1.1.3"], "affected": ">= 10.0.8.0, <= 10.0.8.12; >= 12.1.0.0, <= 12.1.1.2", "ecosystem": "vendor"}]
ecosystems: []
tags: ["api-gateway", "ibm-api-connect", "infrastructure"]
not_affected_if: ["outside-affected-versions"]
published_at: "2026-11-07T05:18:29+00:00"
first_seen_at: "2026-11-07T05:46:00+00:00"
updated_at: "2026-11-07T06:24:02+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17190", "first_seen_at": "2026-11-07T05:46:00+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41", "first_seen_at": "2026-11-07T06:24:02+00:00", "cites": ["https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41", "https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39"]}]
exploit_sources: []
---

# IBM API Connect: stored XSS in provider-supplied HTML runs scripts

Link for people: https://infrastack.ai/live/CVE-2026-17190 (this .md is for agents)

IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 do not sanitize HTML supplied by a provider before displaying it. An authenticated attacker can get script to run in another user's browser.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:API Connect affected >= 10.0.8.0, <= 10.0.8.12; >= 12.1.0.0, <= 12.1.1.2 fixed 10.0.8.13, 12.1.1.3

## How to check

Check your API Connect version. Affected: 10.0.8.0 through 10.0.8.12, and 12.1.0.0 through 12.1.1.2. Fixed: 10.0.8.13 and 12.1.1.3.

## Fix

Upgrade to API Connect 10.0.8.13 (10.0.8 line) or 12.1.1.3 (12.1 line) via IBM Fix Central. IBM lists no workaround.

## Timeline

- 2026-11-07T05:46:00+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-17190
- 2026-11-07T06:24:02+00:00 analyst https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41 — IBM bulletins (-41 for 10.0.8.13, -39 for 12.1.1.3) list CVE-2026-17190 (CWE-79, 8.7). Fixes: 10.0.8.13 and 12.1.1.3. Read the 10.0.8 table in full; the 12.1 bulletin was cut off, so I got its fix only from its summary line. No workaround listed. The specific HTML fields are not named by IBM. No exploitation or PoC found.

## Documents

- [advisory] IBM Security Bulletin: Multiple Vulnerabilities in IBM API Connect (10.0.8.13) https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-41
- [advisory] IBM Security Bulletin: Multiple Vulnerabilities in IBM API Connect (v12.1.1.3) https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39

## From the sources

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to execute arbitrary JavaScript due to cross-site scripting. HTML content supplied by a provider is not sufficiently sanitized before it is displayed, which could allow script content to run in the user's browser.

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