‼️ BREAKING: Oracle Issues Emergency Java Update for Critical 9.1 HTTPS Trust Vulnerability
Details: https://t.co/XZV8KY0rPW
Oracle has released an emergency Java security update to address CVE-2026-91403, a critical vulnerability affecting how Java applications trust digital certificates. Published on October 21, 2026, the alert assigns the flaw a CVSS 3.1 score of 9.1 and covers Oracle Java SE and GraalVM.
The update blocks affected intermediate certificate authority certificates linked to eMudhra. According to Oracle’s security advisory, the issue affects the Java Secure Socket Extension, or JSSE, component.
Oracle rates exploitation as low complexity, with no authentication or user interaction required. Successful attacks can expose or change sensitive data, although the risk matrix lists no availability impact.
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