SB20261110200 - Multiple vulnerabilities in Oracle WebCenter Sites

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Main Vulnerability Database SB20261110200

SB20261110200 - Multiple vulnerabilities in Oracle WebCenter Sites

Published: November 10, 2026

Security Bulletin ID SB20261110200
CSH Severity
High
Patch available
YES
Number of vulnerabilities 5
Exploitation vector Remote access
Highest impact Code execution

Breakdown by Severity

High 20% Medium 80%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 5 vulnerabilities.


1) Improper Certificate Validation (CVE-ID: CVE-2026-34477)

CWE-ID: CWE-295 - Improper Certificate Validation

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote attacker to perform a man-in-the-middle attack.

The vulnerability exists due to improper certificate validation in the TLS hostname verification handling of the verifyHostName attribute in Log4j Core SSL configuration when establishing TLS connections for SMTP, Socket, or Syslog appenders. A remote attacker can present a certificate issued by a trusted certificate authority to perform a man-in-the-middle attack.

The issue occurs only when TLS is configured via a nested SSL configuration element, and it does not affect the HTTP appender.


2) Improper input validation (CVE-ID: CVE-2026-91240)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The vulnerability exists due to improper input validation within the WebCenter Sites component in Oracle WebCenter Sites. A remote non-authenticated attacker can exploit this vulnerability to gain access to sensitive information.


3) Improper input validation (CVE-ID: CVE-2026-91552)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The vulnerability exists due to improper input validation within the WebCenter Sites component in Oracle WebCenter Sites. A remote non-authenticated attacker can exploit this vulnerability to gain access to sensitive information.


4) Improper input validation (CVE-ID: CVE-2026-91542)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]


The vulnerability allows a remote non-authenticated attacker to gain access to sensitive information.

The vulnerability exists due to improper input validation within the WebCenter Sites component in Oracle WebCenter Sites. A remote non-authenticated attacker can exploit this vulnerability to gain access to sensitive information.


5) Improper input validation (CVE-ID: CVE-2026-101499)

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 WebCenter Sites component in Oracle WebCenter Sites. A remote non-authenticated attacker can exploit this vulnerability to execute arbitrary code.


Remediation

Install update from vendor's website.

References