Denial of Service Vulnerability in Oracle Java SE
CVE-2026-47057

7.5HIGH

Key Information:

Vendor

Oracle
Status
Oracle Java Se
Vendor
CVE Published:
21 July 2026

What is CVE-2026-47057?

A vulnerability exists in Oracle Java SE affecting versions 8u491, 8u491-perf, and 11.0.31, allowing unauthenticated attackers with network access to exploit the scripting component. This easily exploitable vulnerability can lead to a complete denial of service (DOS), causing the application to hang or crash repeatedly. Attackers may leverage APIs enabled in the component through web services to execute the exploit. The risk extends to Java deployments that run untrusted code, such as those relying on sandboxed Java Web Start applications or applets that utilize Java’s security features.

Affected Version(s)

Oracle Java SE 8u491

Oracle Java SE 8u491-perf

Oracle Java SE 11.0.31

References

https://www.oracle.com/security-alerts/cpujul2026.html
vendor-advisory

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.