CVE-2026-18683: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to privilege escalation via Navigator for i. An authenticated user could elevate privileges to a root user to execute commands.
AI Analysis
Technical Summary
CVE-2026-18683 is an OS Command Injection vulnerability affecting IBM i versions 7.3 through 7.6. The flaw exists in Navigator for i, where improper neutralization of special elements in OS commands allows an authenticated user with limited privileges to escalate to root privileges and execute arbitrary commands on the system. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity with network attack vector, low attack complexity, and no user interaction required.
Potential Impact
Successful exploitation allows an authenticated user to escalate privileges to root, enabling full control over the affected system. This can lead to complete compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to Navigator for i to trusted users only and monitor for suspicious activity.
CVE-2026-18683: CWE-78 Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
Description
IBM i 7.6, 7.5, 7.4, and 7.3 is vulnerable to privilege escalation via Navigator for i. An authenticated user could elevate privileges to a root user to execute commands.
CVSS v3.1
Score 8.8high
Affected software
IBM
cpe:2.3:a:ibm:i:7.6:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.6.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.5.0:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4:*:*:*:*:*:*:*cpe:2.3:a:ibm:i:7.4.0:*:*:*:*:*:*:*Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-18683 is an OS Command Injection vulnerability affecting IBM i versions 7.3 through 7.6. The flaw exists in Navigator for i, where improper neutralization of special elements in OS commands allows an authenticated user with limited privileges to escalate to root privileges and execute arbitrary commands on the system. The vulnerability has a CVSS 3.1 base score of 8.8, indicating high severity with network attack vector, low attack complexity, and no user interaction required.
Potential Impact
Successful exploitation allows an authenticated user to escalate privileges to root, enabling full control over the affected system. This can lead to complete compromise of confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Patch status is not yet confirmed — check the IBM vendor advisory for current remediation guidance. No official fix or temporary workaround is currently documented. Until a patch is available, restrict access to Navigator for i to trusted users only and monitor for suspicious activity.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-08-03T15:43:22.766Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a7ca94fbf8831d539e05c6c
Added to database: 08/12/2026, 17:11:43 UTC
Last enriched: 08/12/2026, 17:26:34 UTC
Last updated: 09/25/2026, 01:47:41 UTC
Views: 36
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