CVE-2026-18246: IBM i is Affected By security restrictions bypass in Navigator for i
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a remote authenticated attacker to bypass security restrictions due to an interpretation conflict in the multipart parser.
Other sources
IBM i could allow a remote authenticated attacker to bypass security restrictions due to an interpretation conflict in the multipart parser.
— IBM
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
IBM ito a version that resolves this vulnerability.Fixed in 7.6Patch SJ10887 - Upgrade
Upgrade
IBM ito a version that resolves this vulnerability.Fixed in 7.5Patch SJ10888 - Upgrade
Upgrade
IBM ito a version that resolves this vulnerability.Fixed in 7.4Patch SJ10890 - Upgrade
Upgrade
IBM ito a version that resolves this vulnerability.Fixed in 7.3Patch SJ10891 - Compensating control
For any IBM i instances still on unsupported versions, upgrade to a supported and fixed version of the affected product to address the security restrictions bypass in the multipart parser.
Event History
Frequently Asked Questions
What is the severity of CVE-2026-18246?
The severity of CVE-2026-18246 is classified as low.
How do I fix CVE-2026-18246?
To fix CVE-2026-18246, you should apply the latest security updates provided by IBM for your version of IBM i.
What versions of IBM i are affected by CVE-2026-18246?
CVE-2026-18246 affects IBM i versions 7.3, 7.4, 7.5, and 7.6.
What type of attack is described in CVE-2026-18246?
CVE-2026-18246 describes a remote authenticated attacker who can bypass security restrictions.
What is the impact of CVE-2026-18246?
The impact of CVE-2026-18246 includes a potential bypass of security restrictions due to an interpretation conflict.