Unauthenticated Vulnerability in Oracle Java SE and GraalVM Products
CVE-2026-91411

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-2026-91411?

This vulnerability in Oracle Java SE and GraalVM products allows unauthenticated attackers with network access to exploit specific APIs, potentially leading to unauthorized actions such as denial of service through application hangs or crashes. Attackers may also gain the ability to manipulate accessible data, such as unauthorized updates, inserts, or deletions. The vulnerability impacts deployments where Java runs untrusted code, including sandboxed Java Web Start applications. Solutions should focus on patching affected versions to mitigate risks.

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:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.