IBMCVE-2026-18221
IBM i: improper authentication
High8.1CVE-2026-18221 · Published Sep 4, 2026 · updated Sep 8, 2026
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote attacker to gain unauthorized access due to improper validation of client-supplied authentication parameters.
Affected versions
| Package | Affected | Fixed in |
|---|---|---|
| i Product | <= 7.6 | No fix yet |
| <= 7.5 | No fix yet | |
| <= 7.4 | No fix yet | |
| <= 7.3 | No fix yet |
Details and references
- CVSS 3.1
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
- Severity from
- the vendor (its own CVE record or advisory)
- Weakness
- CWE-287
More IBM advisories
All IBM| Date | Advisory | Severity | Fixed in |
|---|---|---|---|
| Sep 4 | IBM i: improper authorization | High8.1 | No fix yet |
| Sep 4 | IBM i: integer overflow | Medium6.3 | No fix yet |
| Sep 4 | IBM ContextForge MCP Gateway: privilege escalation | High8.8 | No fix yet |
| Sep 4 | IBM ContextForge MCP Gateway - Translate utility: information disclosure | High7.4 | No fix yet |
| Sep 4 | IBM Langflow OSS: path traversal | Medium5.4 | No fix yet |
| Sep 4 | IBM Langflow OSS: information disclosure | Medium6.5 | No fix yet |