Vulnerability in Oracle Java SE and GraalVM Products
CVE-2026-91396

6.5MEDIUM

Key Information:

Vendor

Oracle
Status
Oracle Java Se
Oracle Graalvm For Jdk
Oracle Graalvm Enterprise Edition
Vendor
CVE Published:
20 October 2026

What is CVE-2026-91396?

This vulnerability affects multiple versions of Oracle Java SE and GraalVM products, allowing unauthenticated attackers with network access to compromise system integrity. Exploitation can lead to unauthorized data manipulation, including updates, inserts, or deletions, and may also result in partial denial of service (DoS) conditions. This risk primarily arises in Java environments utilizing sandboxed applications that execute untrusted code, heightening exposure to security threats via web service API interactions.

Affected Version(s)

Oracle GraalVM Enterprise Edition 21.3.19.1.1

Oracle GraalVM for JDK 17.0.20.1

Oracle GraalVM for JDK 21.0.12.1

References

https://www.oracle.com/security-alerts/cpuoct2026.html
vendor-advisory

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.