---
id: "CVE-2026-17303"
page: "https://infrastack.ai/live/CVE-2026-17303"
kind: "vulnerability"
aliases: ["CVE-2026-17303"]
title: "IBM API Connect: authenticated users can reach internal systems via URL"
severity: "medium"
cvss: 6.4
epss: null
exploited: false
status: "open"
category: "vendor"
products: []
ecosystems: []
tags: ["ibm-api-connect", "self-hosted", "vendor"]
not_affected_if: ["version-outside-range"]
published_at: "2026-11-07T05:18:38+00:00"
first_seen_at: "2026-11-07T05:46:02+00:00"
updated_at: "2026-11-07T05:52:42+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17303", "first_seen_at": "2026-11-07T05:46:02+00:00"}]
exploit_sources: []
---

# IBM API Connect: authenticated users can reach internal systems via URL

Link for people: https://infrastack.ai/live/CVE-2026-17303 (this .md is for agents)

IBM API Connect does not sufficiently restrict a user-supplied URL, so the server can be made to contact internal systems. A remote attacker with a valid account can use the server to reach internal network resources.

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

## How to check

- Confirm the installed API Connect version with the product's admin console or installation records, and compare it to the affected ranges `10.0.8.0` through `10.0.8.12` and `12.1.0.0` through `12.1.1.2`

## Timeline

- 2026-11-07T05:46:02+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-17303

## 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 access internal network resources due to improper validation of a user-supplied URL. The address is not sufficiently restricted, which could allow the server to contact internal systems.

---

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