---
id: "CVE-2026-17355"
page: "https://infrastack.ai/live/CVE-2026-17355"
kind: "vulnerability"
aliases: ["CVE-2026-17355"]
title: "IBM API Connect: server-side request forgery exposes internal network resources"
severity: "high"
cvss: 8.2
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: ["unknown"]
published_at: "2026-11-07T05:18:47+00:00"
first_seen_at: "2026-11-07T05:46:05+00:00"
updated_at: "2026-11-07T06:14:12+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17355", "first_seen_at": "2026-11-07T05:46:05+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/node/7295635", "first_seen_at": "2026-11-07T06:14:12+00:00", "cites": ["https://www.ibm.com/support/pages/node/7295635"]}]
exploit_sources: []
---

# IBM API Connect: server-side request forgery exposes internal network resources

Link for people: https://infrastack.ai/live/CVE-2026-17355 (this .md is for agents)

IBM API Connect 12.1.0.0 through 12.1.1.2 has a server-side request forgery flaw: destination checks on outbound requests can be bypassed. A remote attacker with an account can make the server reach internal systems it should block and read sensitive information from them.

_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

Find your installed IBM API Connect V12 on-prem version. v12.1.0.0 through v12.1.1.2 are affected; v12.1.1.3 is fixed. The bulletin gives no version command.

## Fix

Upgrade IBM API Connect to v12.1.1.3 (Fix Central: https://www.ibm.com/support/pages/node/7290205)

## Timeline

- 2026-11-07T05:46:05+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-17355
- 2026-11-07T06:14:12+00:00 analyst https://www.ibm.com/support/pages/node/7295635 — Read IBM bulletin node/7295635: CVE-2026-17355 (CWE-918, 8.2) affects API Connect V12 OnPrem v12.1.0.0-v12.1.1.2; fix v12.1.1.3; workarounds: None. Bulletin bundles ~50 CVEs. No PoC/exploitation found; 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/node/7295635

## From the sources

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to obtain sensitive information from internal network resources due to server-side request forgery. Destination checks on outbound requests can be bypassed, which could allow the server to reach internal systems that should be blocked.

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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_