Vulnerability in Oracle Java SE and GraalVM affecting multiple components
CVE-2026-91453

5.3MEDIUM

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-2026-91453?

A vulnerability exists in the Lightweight HTTP Server component of Oracle Java SE and GraalVM, enabling unauthenticated attackers with network access to exploit it through various protocols. The vulnerability allows, without the need for Untrusted Java Web Start applications or Untrusted Java applets, unauthorized updates, inserts, or deletions of accessible data in the affected products. This represents a significant risk to organizations relying on these software solutions, as successful exploitation can compromise data integrity.

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:
5.3
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

.