Summary
CVE-2026-15784 is an out-of-bounds write vulnerability (CWE-787) in IBM DataPower Gateway that could allow a remote attacker to execute arbitrary code. It is rated High with a CVSS v3.1 base score of 8.1. IBM published the advisory on October 8, 2026.
Technical details
- Root cause: out-of-bounds write (CWE-787) in IBM DataPower Gateway.
- Trigger conditions: the CVSS vector indicates high attack complexity, no privileges required and no user interaction. IBM has not published further trigger details in the sources reviewed.
- Attack vector: network, remote attacker.
- Impact: arbitrary code execution, with high impact to confidentiality, integrity and availability.
Affected software
- IBM DataPower Gateway 10.5.0.0 through 10.5.0.22
- IBM DataPower Gateway 10.6.0.0 through 10.6.0.10
- IBM DataPower Gateway 10.6CD 10.6.1 through 10.6.6
- IBM DataPower Gateway 11.0.0.0 through 11.0.0.2
Severity
CVSS v3.1 base score: 8.1 (High)
Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Mitigation and recommended actions
- Immediate: upgrade to a fixed release:
- 10.5.0.x → 10.5.0.23
- 10.6.0.x → 10.6.0.11
- 10.6CD (10.6.1–10.6.6) → 11.0.0.3
- 11.0.0.x → 11.0.0.3
- Consult the IBM advisory for the full list of fixes and any interim guidance. No workarounds were identified in the sources reviewed.

