November 14, 2026

CVE Watchtower

CVE-2026-16884Ibm Api Connect XML External Entity (XXE) Reference

NVDCVSS scored by psirt@us.ibm.com

Vulnerability Summary

IBM 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.
Severity Level
CRITICAL(9.9)
Published Date
Nov 7, 2026
Last Modified
Nov 11, 2026
Exploitation Status
No confirmed exploitation yet
EPSS Score (30-Day)
0.50%Probability
Root Weakness (CWE)
CWE-611: XML External Entity (XXE) Reference β†—
The product processes an XML document that can contain XML entities with URIs that resolve to documents outside of the intended sphere of control.
CVSS v3.1 Base Metrics — Score 9.9 (CRITICAL)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:L/A:L
Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredNone
User InteractionNone
ScopeChanged
ConfidentialityHigh
IntegrityLow
AvailabilityLow

Affected & Patched Versions

Affected Versions
  • Ibm Api Connect >= 12.1.0.0 and < 12.1.1.3
Patched Versions
  • Ibm Api Connect 12.1.1.3

What to do

Plan remediation soon. No exploitation is confirmed yet, but the severity is critical.

  1. Check whether you run Ibm Api Connect and which version.
  2. Update to a patched version listed above, then confirm the new version.

Timeline

  • Nov 7, 2026Published
  • Nov 11, 2026Record last modified

Score, severity and exploitation changes are tracked from the day Watchtower started logging them.

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External References

Data last checked: Nov 14, 2026 05:11 UTC