CVE-2026-18511
IBM i is Affected By Multiple Vulnerabilities in Java Secure Sockets Extension
CVSS Score
7.3
EPSS Score
0.0%
EPSS Percentile
0th
IBM i 7.6, 7.5, 7.4, and 7.3 could allow a local authenticated attacker to generate a stack-based buffer overflow in the Native IBM i JSSE provider, caused by improper bounds checking during TLS session establishment. A local attacker could overflow a fixed-length buffer and execute arbitrary code on the system or cause the JVM process to crash.
| CWE | CWE-787 |
| Vendor | ibm |
| Product | i |
| Published | Aug 13, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low
Affected Versions
IBM / i
7.6 7.5 7.4 7.3