Heap-based buffer overflow in Oracle WebLogic Server Proxy Plug-In - CVE-2026-21962
Published: January 20, 2026 / Updated: April 1, 2026
Vulnerability identifier: #VU121716
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2026-21962
CWE-ID: CWE-122
Exploitation vector: Remote access
Exploit availability:
The vulnerability is being exploited in the wild
Vendor: Oracle
Affected software:
Oracle WebLogic Server Proxy Plug-In
Oracle WebLogic Server Proxy Plug-In
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The vulnerability exists due to a boundary error in Oracle WebLogic Server Proxy Plug-in when handling HTTP requests. A remote attacker can send specially crafted HTTP requests to the server, trigger a heap-based buffer overflow and execute arbitrary code on the target system.
Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.
How to mitigate CVE-2026-21962
Install updates from vendor's website.