---
id: "CVE-2026-75590"
page: "https://infrastack.ai/live/CVE-2026-75590"
kind: "vulnerability"
aliases: ["CVE-2026-75590"]
title: "IBM API Connect: server-side request forgery leaks internal network data"
severity: "high"
cvss: 7.2
epss: null
exploited: false
status: "open"
category: "vendor"
products: [{"name": "API Connect V12 OnPrem", "fixed": ["12.1.1.3"], "affected": ">= 12.1.0.0, <= 12.1.1.2", "ecosystem": "vendor"}]
ecosystems: []
tags: ["api-gateway", "ibm-api-connect", "self-hosted", "ssrf", "vendor"]
not_affected_if: ["other-versions"]
published_at: "2026-11-07T05:19:01+00:00"
first_seen_at: "2026-11-07T05:46:08+00:00"
updated_at: "2026-11-07T06:03:54+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75590", "first_seen_at": "2026-11-07T05:46:08+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39", "first_seen_at": "2026-11-07T06:03:54+00:00", "cites": ["https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39", "https://www.ibm.com/support/pages/ibm%C2%AE-api-connect-v12113-now-available"]}]
exploit_sources: []
---

# IBM API Connect: server-side request forgery leaks internal network data

Link for people: https://infrastack.ai/live/CVE-2026-75590 (this .md is for agents)

IBM API Connect versions 12.1.0.0 through 12.1.1.2 contain a server-side request forgery flaw, where a protection against requests to internal addresses can be bypassed. A remote attacker can make the server contact internal services and receive part of their responses.

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

## Affected

- vendor:API Connect V12 OnPrem affected >= 12.1.0.0, <= 12.1.1.2 fixed 12.1.1.3

## How to check

Check your installed API Connect V12 on-prem (self-hosted) version. Versions v12.1.0.0 through v12.1.1.2 are affected; v12.1.1.3 contains the fix. IBM's CVSS vector says no authentication is needed, so also check whether API Connect endpoints are reachable from untrusted networks.

## Fix

Upgrade IBM API Connect V12 OnPrem to v12.1.1.3 (Fix Central: https://www.ibm.com/support/pages/node/7290205). IBM lists no workarounds or interim fixes.

## Timeline

- 2026-11-07T05:46:08+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-75590
- 2026-11-07T06:03:54+00:00 analyst https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39 — IBM bulletin (security-bulletin-multiple-vulnerabilities-ibm-api-connect-39) lists CVE-2026-75590: affects API Connect V12 OnPrem v12.1.0.0-v12.1.1.2, fix upgrade to v12.1.1.3 via Fix Central, workarounds None, no interim fix. Bulletin page metadata says up to 12.1.1.3 but table says 12.1.1.2. No exploitation or PoC seen; did not search social.

## Documents

- [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
- [fix] IBM API Connect v12.1.1.3 is now available https://www.ibm.com/support/pages/ibm%C2%AE-api-connect-v12113-now-available

## From the sources

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to access internal network resources and obtain sensitive information due to server-side request forgery. A protection that blocks requests to internal addresses can be bypassed, so the server could be made to contact internal services and return part of their responses.

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