SB2026111020 - Multiple vulnerabilities in Oracle Database Server

Description

This security bulletin contains information about 13 vulnerabilities.

1) Improper input validation (CVE-ID: CVE-2026-73964)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote privileged user to gain access to sensitive information.

The vulnerability exists due to improper input validation within the RDBMS in Oracle Database Server. A remote privileged user can exploit this vulnerability to gain access to sensitive information.

2) 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.

3) Improper input validation (CVE-ID: CVE-2026-101510)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6.7 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a local privileged user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the Oracle Net Services in Oracle Database Server. A local privileged user can exploit this vulnerability to perform a denial of service (DoS) attack.

4) Incorrect authorization (CVE-ID: CVE-2026-59889)

CWE-ID: CWE-863 - Incorrect Authorization

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote user to escalate privileges.

The vulnerability exists due to improper access control in UnwrappedPropertyHandler.processUnwrapped() when deserializing @JsonUnwrapped container properties under a less-privileged active view. A remote user can supply crafted JSON values for a property annotated with both @JsonView and @JsonUnwrapped to escalate privileges.

This affects the write-side authorization behavior of @JsonView during deserialization, including merge and builder-based deserialization paths.

5) Improper input validation (CVE-ID: CVE-2026-91615)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 6 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote authenticated user to manipulate data.

The vulnerability exists due to improper input validation within the Java VM in Oracle Database Server. A remote authenticated user can exploit this vulnerability to manipulate data.

6) Improper input validation (CVE-ID: CVE-2026-91479)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 7.1 [CVSS:4.0/AV:A/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 non-authenticated attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the RDBMS in Oracle Database Server. A remote non-authenticated attacker can exploit this vulnerability to perform a denial of service (DoS) attack.

7) Improper input validation (CVE-ID: CVE-2026-101512)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

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

The vulnerability exists due to improper input validation within the RDBMS in Oracle Database Server. A remote authenticated user can exploit this vulnerability to gain access to sensitive information.

8) Improper input validation (CVE-ID: CVE-2026-91568)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 7.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]

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

The vulnerability exists due to improper input validation within the RDBMS in Oracle Database Server. A remote authenticated user can exploit this vulnerability to gain access to sensitive information.

9) Improper input validation (CVE-ID: CVE-2026-91503)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a remote authenticated user to read and manipulate data.

The vulnerability exists due to improper input validation within the VPD in Oracle Database Server. A remote authenticated user can exploit this vulnerability to read and manipulate data.

10) Improper input validation (CVE-ID: CVE-2026-93569)

CWE-ID: CWE-20 - Improper input validation

CVSSv4: 8.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/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 RDBMS (Micronaut) in Oracle Database Server. A remote non-authenticated attacker can exploit this vulnerability to read and manipulate data.

11) Improper input validation (CVE-ID: CVE-2026-91499)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote authenticated user to execute arbitrary code.

The vulnerability exists due to improper input validation within the RDBMS in Oracle Database Server. A remote authenticated user can exploit this vulnerability to execute arbitrary code.

12) Improper input validation (CVE-ID: CVE-2026-91563)

CWE-ID: CWE-20 - Improper input validation

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

The vulnerability allows a remote authenticated user to execute arbitrary code.

The vulnerability exists due to improper input validation within the Oracle OLAP in Oracle Database Server. A remote authenticated user can exploit this vulnerability to execute arbitrary code.

13) Improper validation of integrity check value (CVE-ID: CVE-2026-75803)

CWE-ID: CWE-354 - Improper Validation of Integrity Check Value

CVSSv4: 4.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N]

The vulnerability allows a local user to bypass integrity checks.

The vulnerability exists due to improper validation of integrity check value in EVP_Cipher() for ChaCha20-Poly1305 and AES-OCB when decrypting an empty ciphertext. A local user can provide a forged empty-ciphertext message with a supplied authentication tag to bypass integrity checks.

The issue occurs when applications use EVP_Cipher() and expect a successful return value to indicate that the AEAD tag was verified.

Remediation

Install update from vendor's website.

References

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