CVE-2026-91333

openjdk: Improve ciphertext handling (Oracle CPU 2026-10)

Published Oct 20, 2026 CVSS 3.1 · 3.7 Low EPSS < 1% KEV · Not listed
Description
Vulnerability in Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 21.0.12.1, 25.0.4.1 and 27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 3.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Ubuntu USN Ubuntu USN USN-9015-1 OpenJDK 21 vulnerabilities
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Weaknesses CWE-502
Type Values Removed Values Added
First Time appeared Oracle oracle Java Se
Vendors & Products Oracle oracle Java Se
Type Values Removed Values Added
Weaknesses CWE-269
CWE-284
Type Values Removed Values Added
Title Unauthorized Data Modification via Oracle Java SE Security APIs openjdk: Improve ciphertext handling (Oracle CPU 2026-10)
Weaknesses CWE-354
References
Metrics threat_severity

None

threat_severity

Low

Type Values Removed Values Added
Title Unauthorized Data Modification via Oracle Java SE Security APIs
Weaknesses CWE-269
CWE-284
Type Values Removed Values Added
Description Vulnerability in Oracle Java SE (component: Security). Supported versions that are affected are Oracle Java SE: 21.0.12.1, 25.0.4.1 and 27. Difficult to exploit vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE. Successful attacks of this vulnerability can result in unauthorized update, insert or delete access to some of Oracle Java SE accessible data. Note: This vulnerability can be exploited by using APIs in the specified Component, e.g., through a web service which supplies data to the APIs. This vulnerability also applies to Java deployments, typically in clients running sandboxed Java Web Start applications or sandboxed Java applets, that load and run untrusted code (e.g., code that comes from the internet) and rely on the Java sandbox for security. CVSS 3.1 Base Score 3.7 (Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N).
First Time appeared Oracle
Oracle java Se
CPEs cpe:2.3:a:oracle:java_se:21.0.12.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:25.0.4.1:*:*:*:*:*:*:*
cpe:2.3:a:oracle:java_se:27:*:*:*:*:*:*:*
Vendors & Products Oracle
Oracle java Se
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
oracle
Published
Updated
Oct 28, 2026, 5:52 PM
Reserved
Sep 14, 2026, 10:10 PM
Status
Awaiting Analysis
Published
Oct 20, 2026, 10:20 PM
Modified
Oct 28, 2026, 6:17 PM
Severity
Low
Public date
Oct 20, 2026, 9:25 PM