---
id: "CVE-2026-17340"
page: "https://infrastack.ai/live/CVE-2026-17340"
kind: "vulnerability"
aliases: ["CVE-2026-17340"]
title: "IBM API Connect: path traversal lets remote attackers run arbitrary code"
severity: "critical"
cvss: 9.8
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", "on-prem", "path-traversal", "unauthenticated", "vendor"]
not_affected_if: ["version-outside-range"]
published_at: "2026-11-07T05:18:45+00:00"
first_seen_at: "2026-11-07T05:46:04+00:00"
updated_at: "2026-11-07T05:54:02+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-17340", "first_seen_at": "2026-11-07T05:46:04+00:00"}, {"source": "analyst", "url": "https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39", "first_seen_at": "2026-11-07T05:54:02+00:00", "cites": ["https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39"]}]
exploit_sources: []
---

# IBM API Connect: path traversal lets remote attackers run arbitrary code

Link for people: https://infrastack.ai/live/CVE-2026-17340 (this .md is for agents)

IBM API Connect versions 12.1.0.0 through 12.1.1.2 contain a path traversal flaw that lets a remote attacker escape intended file locations. The flaw can lead to arbitrary code execution on the affected server.

_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 OnPrem version; versions v12.1.0.0 through v12.1.1.2 are affected, v12.1.1.3 is fixed.
- The flaw needs no authentication or user interaction (CVSS AV:N/PR:N/UI:N), so any instance reachable from an untrusted network is exposed.

## Fix

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

## Timeline

- 2026-11-07T05:46:04+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-17340
- 2026-11-07T05:54:02+00:00 analyst https://www.ibm.com/support/pages/security-bulletin-multiple-vulnerabilities-ibm-api-connect-39 — Read IBM bulletin (api-connect-39): CVE-2026-17340 CWE-22, 9.8, AV:N/PR:N (no auth); affected API Connect V12 OnPrem v12.1.0.0-v12.1.1.2; fixed v12.1.1.3; workarounds none. No exploitation/PoC seen.

## 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

## From the sources

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to execute arbitrary code due to a path traversal vulnerability.

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