CVE-2026-91403
Summary
| CVE | CVE-2026-91403 |
|---|---|
| State | PUBLISHED |
| Assigner | oracle |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-10-21 22:16:50 UTC |
| Updated | 2026-10-23 04:18:19 UTC |
| 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). |
Risk And Classification
Primary CVSS: v3.1 9.1 CRITICAL from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS: 0.003920000 probability, percentile 0.321490000 (date 2026-10-22)
Problem Types: 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.
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 9.1 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| 3.1 | CNA | DECLARED | 9.1 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
CVSS v3.1 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Oracle Corporation | Oracle Java SE | affected 8u511 | Not specified |
| CNA | Oracle Corporation | Oracle Java SE | affected 8u511-perf | Not specified |
| CNA | Oracle Corporation | Oracle Java SE | affected 11.0.33 | Not specified |
| CNA | Oracle Corporation | Oracle Java SE | affected 17.0.21 | Not specified |
| CNA | Oracle Corporation | Oracle Java SE | affected 21.0.13 | Not specified |
| CNA | Oracle Corporation | Oracle Java SE | affected 25.0.5 | Not specified |
| CNA | Oracle Corporation | Oracle Java SE | affected 27.0.1 | Not specified |
| CNA | Oracle Corporation | Oracle GraalVM For JDK | affected 17.0.21 | Not specified |
| CNA | Oracle Corporation | Oracle GraalVM For JDK | affected 21.0.13 | Not specified |
| CNA | Oracle Corporation | Oracle GraalVM Enterprise Edition | affected 21.3.20 | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.oracle.com/security-alerts/alert-cve-2026-91403.html | [email protected] | www.oracle.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |