---
id: "CVE-2026-17343"
page: "https://infrastack.ai/live/CVE-2026-17343"
kind: "vulnerability"
aliases: ["CVE-2026-17343"]
title: "IBM API Connect: authenticated users can bypass authorization checks on data"
severity: "high"
cvss: 8.1
epss: null
exploited: false
status: "open"
category: "infrastructure"
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", "authenticated", "ibm-api-connect", "infrastructure", "self-hosted"]
not_affected_if: ["unknown"]
published_at: "2026-11-07T05:18:46+00:00"
first_seen_at: "2026-11-07T05:46:04+00:00"
updated_at: "2026-11-07T06:14:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17343", "first_seen_at": "2026-11-07T05:46:04+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/node/7295635", "first_seen_at": "2026-11-07T06:14:05+00:00", "cites": ["https://www.ibm.com/support/pages/node/7295635"]}]
exploit_sources: []
---

# IBM API Connect: authenticated users can bypass authorization checks on data

Link for people: https://infrastack.ai/live/CVE-2026-17343 (this .md is for agents)

IBM API Connect versions 12.1.0.0 through 12.1.1.2 fail to enforce proper authorization checks. A remote attacker with a valid account can read or modify sensitive information they should not reach.

_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 API Connect V12 on-prem version: affected if it is v12.1.0.0 through v12.1.1.2. IBM lists no workaround; the fix is v12.1.1.3. Also check if you run other API Connect lines: the bulletin lists only V12 OnPrem for this CVE.

## Fix

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

## Timeline

- 2026-11-07T05:46:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-17343
- 2026-11-07T06:14:05+00:00 analyst https://www.ibm.com/support/pages/node/7295635 — Read IBM bulletin node/7295635: CVE-2026-17343 CWE-863, CVSS 8.1, affects API Connect V12 OnPrem v12.1.0.0-v12.1.1.2, fix v12.1.1.3, no workarounds. No exploitation info; X not searched (low-signal, B tier).

## 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 bypass authorization checks to access or modify sensitive information due to improper authorization.

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