CVE-2026-18511
High · 7.3CVSS
7.3
EPSS
0.3%
Published
Aug 13, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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