---
id: "CVE-2026-17139"
page: "https://infrastack.ai/live/CVE-2026-17139"
kind: "vulnerability"
aliases: ["CVE-2026-17139"]
title: "IBM API Connect: stored script injection via URL fields runs in other users' browsers"
severity: "medium"
cvss: 5.4
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["ibm-api-connect", "self-hosted", "vendor"]
not_affected_if: ["outside-affected-versions"]
published_at: "2026-11-07T05:18:27+00:00"
first_seen_at: "2026-11-07T05:45:59+00:00"
updated_at: "2026-11-07T05:54:09+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17139", "first_seen_at": "2026-11-07T05:45:59+00:00"}]
exploit_sources: []
---

# IBM API Connect: stored script injection via URL fields runs in other users' browsers

Link for people: https://infrastack.ai/live/CVE-2026-17139 (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 validate certain URL fields. A remote attacker with a valid account can plant script content there that runs in another user's browser session.

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

## How to check

- Check the installed API Connect version against the affected ranges, 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2.

## Timeline

- 2026-11-07T05:45:59+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-17139

## 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 scripts due to cross-site scripting. Certain URL fields are not sufficiently validated, so malicious script content could run in another user's browser session.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_