API-CONNECT · CVE-2026-16884 · Vendor
FIX → 12.1.1.3
IBM API Connect versions 12.1.0.0 through 12.1.1.2 process XML input that can reference external entities. A remote attacker can use this XML external entity (XXE) injection to obtain sensitive information from the server.
first public Nov 7, 2026 · 2 sources
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Teams running self-managed IBM API Connect V12 (OnPrem) 12.1.0.0 through 12.1.1.2. IBM rates the flaw as network-reachable without a login, so an exposed API Connect deployment is the main concern. IBM's text read so far does not name the XML endpoints or say whether the flaw is on by default. Other versions can skip it.
Not affected if version-outside-range
Who cares api-gateway, ibm-api-connect, on-prem, self-hosted
12.1.0.0 through 12.1.1.2 is affected, 12.1.1.3 is the fixed release10.0.8.x are not listed for this CVEs CVSS vector rates it network-reachable with no authentication (AV:N/PR:N); IBMs text does not say which endpoints take the XMLIBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information due to an XML external entity (XXE) injection.
This page as .md · .json · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
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Upgrade to 12.1.1.3
Upgrade IBM API Connect to v12.1.1.3 (IBM Fix Central; release notice: https://www.ibm.com/support/pages/node/7290205).