API-CONNECT · CVE-2026-17354 · Vendor
FIX → 12.1.1.3 ✓ verified
IBM API Connect V12 OnPrem v12.1.0.0 through v12.1.1.2 has a path traversal flaw (CWE-22) that lets a remote authenticated user write arbitrary files on the server (CVSS 9.9). IBM fixed it in v12.1.1.3 and lists no workarounds. The bulletin does not name the endpoint or describe exploitation.
first public Nov 7, 2026 · 2 sources
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Teams running self-hosted IBM API Connect V12 (on-prem) at v12.1.0.0 through v12.1.1.2. Exploitation needs a valid login (low privileges), but the bulletin rates scope as changed with high impact, so any user account on the platform counts. Teams on other API Connect lines or not running V12 on-prem are not listed in this bulletin.
Not affected if unknown
Who cares api-gateway, auth-required, ibm-api-connect, self-hosted
v12.1.0.0 and v12.1.1.2 inclusivev12.1.1.3IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to perform arbitrary file writes due to path traversal.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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Upgrade to 12.1.1.3
v12.1.1.3 (Fix Central: https://www.ibm.com/support/pages/node/7290205)