SB20261110192 - Multiple vulnerabilities in Oracle Middleware Common Libraries and Tools

Description

This security bulletin contains information about 8 vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2026-91616)

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

CVSSv4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/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 Remote Diagnostic Agent component in Oracle Middleware Common Libraries and Tools. A remote non-authenticated attacker can exploit this vulnerability to gain access to sensitive information.

2) Missing Release of Resource after Effective Lifetime (CVE-ID: CVE-2026-64607)

CWE-ID: CWE-772 - Missing Release of Resource after Effective Lifetime

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 cause a denial of service.

The vulnerability exists due to improper resource management in the classic i/o model HttpClient connection handling when processing a response with an invalid or unsupported content-encoding header value. A remote attacker can send a response with an invalid or unsupported content-encoding header value to cause a denial of service.

Only the classic i/o model is affected; the async i/o model is not affected.

3) Improper input validation (CVE-ID: CVE-2026-91617)

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

CVSSv4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local authenticated user to gain access to sensitive information.

The vulnerability exists due to improper input validation within the Remote Diagnostic Agent component in Oracle Middleware Common Libraries and Tools. A local authenticated user can exploit this vulnerability to gain access to sensitive information.

4) 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.

5) Uncontrolled Memory Allocation (CVE-ID: CVE-2026-59649)

CWE-ID: CWE-789 - Uncontrolled Memory Allocation

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 cause a denial of service.

The vulnerability exists due to uncontrolled memory allocation in OpenPGP user-attribute subpacket parsing when processing a length bounded only by JVM max memory. A remote attacker can supply a crafted subpacket to cause a denial of service.

6) Resource exhaustion (CVE-ID: CVE-2026-54399)

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 cause a denial of service.

The vulnerability exists due to uncontrolled resource consumption in the HTTP/1.1 message parser when processing messages with an excessive number of headers or excessive header length. A remote attacker can send a specially crafted HTTP message to cause a denial of service.

The issue leads to memory exhaustion.

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) Improper input validation (CVE-ID: CVE-2026-47065)

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 Third Party (Apache Mina) component in Oracle Access Manager. A remote non-authenticated attacker can exploit this vulnerability to execute arbitrary code.

Remediation

Install update from vendor's website.

References

• https://www.oracle.com/security-alerts/cpuoct2026.html