Unauthenticated Data Access Vulnerability in Oracle Java SE and GraalVM Products
CVE-2026-91334

3.7LOW

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-2026-91334?

A vulnerability exists in Oracle Java SE and GraalVM products that may be exploited by an unauthenticated attacker with network access, allowing unauthorized read access to specific data within the affected systems. The risk is particularly relevant for environments utilizing Java applications that load external, untrusted code and depend on the Java sandbox for security. This can include clients running Java Web Start applications or Java applets. Exploitation of this vulnerability can lead to sensitive information being compromised through various network protocols.

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:
3.7
Severity:
LOW
Confidentiality:
Low
Integrity:
None
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.