CVE-2026-91403
Quick assessment
Affected
Oracle Corporation Oracle Java SE
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Oracle Java SE、Oracle GraalVM for JDK 以及 Oracle GraalVM Enterprise Edition 产品中的 Oracle Java SE 组件（JSSE）存在漏洞。受影响的受支持版本包括：Oracle Java SE 8u511、8u511-perf、11.0.33、17.0.21、21.0.13、25.0.5 和 27.0.1；Oracle GraalVM for JDK 17.0.21 和 21.0.13；Oracle GraalVM Enterprise E
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 10
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Oracle Corporation | Oracle GraalVM Enterprise Edition | 21.3.20 |
affected |
| Oracle Corporation | Oracle GraalVM for JDK | 17.0.21 |
affected |
21.0.13 |
affected | ||
| Oracle Corporation | Oracle Java SE | 8u511 |
affected |
8u511-perf |
affected | ||
11.0.33 |
affected | ||
17.0.21 |
affected | ||
21.0.13 |
affected | ||
25.0.5 |
affected | ||
27.0.1 |
affected |
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I. Basic Information for CVE-2026-91403
Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Vulnerability in the Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: JSSE). Supported versions that are affected are Oracle Java SE: 8u511, 8u511-perf, 11.0.33, 17.0.21, 21.0.13, 25.0.5, 27.0.1; Oracle GraalVM for JDK: 17.0.21 and 21.0.13; Oracle GraalVM Enterprise Edition: 21.3.20. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition accessible data as well as unauthorized access to critical data or complete access to all Oracle Java SE, Oracle GraalVM for JDK, Oracle GraalVM Enterprise Edition 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 9.1 (Confidentiality and Integrity impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N).
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Oracle Corporation | Oracle Java SE | 8u511 | - |
|
| Oracle Corporation | Oracle GraalVM for JDK | 17.0.21 | - |
|
| Oracle Corporation | Oracle GraalVM Enterprise Edition | 21.3.20 | - |
|
II. Public POCs for CVE-2026-91403
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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No public POC found.
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IV. Related Vulnerabilities
Same vendor: Oracle Corporation
V. Comments for CVE-2026-91403
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