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Not in CISA KEV
HIGH severity

CVE-2026-16709 — Ibm Api Connect

HIGH

CVE-2026-16709 is a high-severity (CVSS 8.7) Cross-site Scripting (XSS) vulnerability in ibm api connect. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to execute arbitrary JavaScript in the victim's browser due to cross-site…

Published
Updated
Affected
1 product
Patched
See advisory
Exploits
None indexed
Exploitation data as of Nov 7, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to execute arbitrary JavaScript in the victim's browser due to cross-site scripting. User-supplied input is not properly neutralized when a web page is updated, so script content could run in another user's session.

Affected Products

1 product · 4 configurations
Application
api connectibm
4 versions
10.0.8.010.0.8.1212.1.0.012.1.1.2

Detection & mitigation playbook

Vendor / appliance

  1. Detect

    Inventory every ibm api connect deployment and check each version against the affected-products list above.

  2. Remediation status

    The records we use list no fixed version for CVE-2026-16709. Check the ibm api connect advisory for a patched release, and apply the workarounds below until you can upgrade.

  3. Mitigate without a patch

    Escape or sanitise the affected output on the server side rather than relying on client-side filtering, and add a Content-Security-Policy that blocks inline script execution so injected markup cannot run even if it reaches the page. Alongside that, restrict the management interface to trusted networks and apply the vendor's recommended configuration mitigations.

Frequently Asked Questions

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to execute arbitrary JavaScript in the victim's browser due to cross-site scripting. User-supplied input is not properly neutralized when a web page is updated, so script content could run in another user's session.
O3 Security · Runtime Protection

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