SB20261110186 - Multiple vulnerabilities in Oracle WebLogic Server
Published: November 10, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 11 vulnerabilities.
1) Improper input validation (CVE-ID: CVE-2026-49844)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to manipulate data.
The vulnerability exists due to improper input validation within the Core (Apache Log4j) component in Oracle Communications Unified Assurance. A remote non-authenticated attacker can exploit this vulnerability to manipulate data.
2) Improper input validation (CVE-ID: CVE-2026-101515)
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 Centralized Thirdparty Jars component in Oracle WebLogic Server. A remote non-authenticated attacker can exploit this vulnerability to gain access to sensitive information.
3) Improper input validation (CVE-ID: CVE-2026-91502)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The vulnerability exists due to improper input validation within the Core component in Oracle WebLogic Server. A remote non-authenticated attacker can exploit this vulnerability to read and manipulate data.
4) Command Injection (CVE-ID: CVE-2025-7962)
CWE-ID: CWE-77 - Command injection
CVSSv4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to execute arbitrary SMTP commands on the system.
The vulnerability exists due to insufficient input validation when handling CR-LF characters in UTF-8 encoding. A remote attacker can pass specially crafted input to the application and execute arbitrary SMTP commands on the server.
5) Resource management error (CVE-ID: CVE-2023-43622)
CWE-ID: CWE-399 - Resource Management Errors
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources within the server when processing HTTP/2 connections with window size of 0. A remote attacker can exhaust available workers on the server and perform a denial of service (DoS) attack.
6) Resource exhaustion (CVE-ID: CVE-2026-9563)
CWE-ID: CWE-400 - Resource exhaustion
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to Eclipse Parsson did not enforce a default maximum on the number of characters consumed while parsing a single JSON document. Applications that parse attacker- controlled JSON can be forced to consume excessive CPU and memory by processing very large documents, including large arrays, objects, strings, numbers, whitespace, or nested structures, resulting in a denial of service. A remote attacker can trigger resource exhaustion and perform a denial of service (DoS) attack.
7) Deserialization of Untrusted Data (CVE-ID: CVE-2026-41855)
CWE-ID: CWE-502 - Deserialization of Untrusted Data
CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform unauthorized actions.
The vulnerability exists due to unsafe deserialization in org.springframework.jms.support.converter.MappingJackson2MessageConverter and org.springframework.jms.support.converter.JacksonJsonMessageConverter when processing messages in an untrusted JMS environment. A remote attacker can send a crafted message to perform unauthorized actions.
Exploitation can lead to arbitrary class instantiation through gadget class deserialization.
8) Insufficient verification of data authenticity (CVE-ID: CVE-2026-12817)
CWE-ID: CWE-345 - Insufficient Verification of Data Authenticity
CVSSv4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to tamper with decrypted OpenPGP data.
The vulnerability exists due to improper authentication tag validation in OpenPGP AEAD decryption when processing chunk-aligned data. A remote attacker can supply crafted encrypted data to tamper with decrypted OpenPGP data.
9) Improper input validation (CVE-ID: CVE-2026-87302)
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:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote non-authenticated attacker to read and manipulate data.
The vulnerability exists due to improper input validation within the Core component in Oracle WebLogic Server. A remote non-authenticated attacker can exploit this vulnerability to read and manipulate data.
10) Improper input validation (CVE-ID: CVE-2026-83399)
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 Core component in Oracle WebLogic Server. A remote non-authenticated attacker can exploit this vulnerability to execute arbitrary code.
11) Improper input validation (CVE-ID: CVE-2026-91323)
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 Core component in Oracle WebLogic Server. A remote non-authenticated attacker can exploit this vulnerability to execute arbitrary code.
Remediation
Install update from vendor's website.