SB2026111019 - Multiple vulnerabilities in Oracle Application Express

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Main Vulnerability Database SB2026111019

SB2026111019 - Multiple vulnerabilities in Oracle Application Express

Published: November 10, 2026

Security Bulletin ID SB2026111019
CSH Severity
High
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 50% Medium 50%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 vulnerabilities.


1) Improper access control (CVE-ID: CVE-2026-66010)

CWE-ID: CWE-284 - Improper Access Control

CVSSv4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to execute arbitrary script code.

The vulnerability exists due to improper access control in the CUSTOM_ELEMENT_HANDLING sanitization logic when processing allowed custom elements. A remote attacker can supply specially crafted HTML content to execute arbitrary script code.

The bypass affects the afterSanitizeElements hook and the payload becomes executable only after a custom element writes sanitized data into innerHTML.


2) Improper input validation (CVE-ID: CVE-2026-101521)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 9.3 [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]


The vulnerability allows a remote non-authenticated attacker to execute arbitrary code.

The vulnerability exists due to improper input validation within the General component in Oracle APEX. A remote non-authenticated attacker can exploit this vulnerability to execute arbitrary code.


Remediation

Install update from vendor's website.

References