What is CVE-2026-35300?

CVE-2026-35300 is a critical-severity vulnerability in Oracle Corporation Weblogic Server, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-06-17.

How severe is CVE-2026-35300?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Deserialization in Oracle Corporation Weblogic Server

CVE-2026-35300

Vulnerability in the WebLogic Server product of Oracle Fusion Middleware (component: Core). Supported versions that are affected are 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0 and 15.1.1.0.0. Easily exploitable vulnerability allows unauthenticat…

Vulnerability class: Insecure Deserialization

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Oracle Corporation Weblogic Server — versions 12.2.1.4.0, 14.1.1.0.0, 14.1.2.0.0

Weakness classification (CWE)

CWE-502 — Deserialization of Untrusted Data

References

secalert_us@oracle.com (vendor-advisory)

Frequently asked questions

What is CVE-2026-35300?: CVE-2026-35300 is a critical-severity vulnerability in Oracle Corporation Weblogic Server, classified under Deserialization of Untrusted Data. CVSS score: 9.8/10. Published 2026-06-17.
How severe is CVE-2026-35300?: Critical severity. CVSS v3 base score is 9.8 out of 10.