Uncontrolled resource consumption in Oracle Java SE CORBA component
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · Low
- Fix status
- No fix listed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-400.
Summary
Oracle Java SE versions 8u503 and 8u503-perf and Oracle GraalVM Enterprise Edition 21.3.19.1.1 are affected. A flaw in the CORBA component causes uncontrolled resource consumption (CWE-400). An unauthenticated remote attacker with network access can exploit it over multiple protocols by supplying data to the component's APIs, such as through a web service, to cause a partial denial of service.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
Vulnerability in the Oracle Java SE, Oracle GraalVM Enterprise Edition product of Oracle Java SE (component: CORBA). Supported versions that are affected are Oracle Java SE: 8u503 and 8u503-perf; Oracle GraalVM Enterprise Edition: 21.3.19.1.1. Easily exploitable vulnerability allows unauthenticated attacker with network access via multiple protocols to compromise Oracle Java SE, Oracle GraalVM Enterprise Edition. Successful attacks of this vulnerability can result in unauthorized ability to cause a partial denial of service (partial DOS) of Oracle Java SE, Oracle GraalVM Enterprise Edition. Note: This vulnerability can only be exploited by supplying data to APIs in the specified Component without using Untrusted Java Web Start applications or Untrusted Java applets, such as through a web service. CVSS 3.1 Base Score 5.3 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L).
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
Remediation
The sources list no fixed version for Oracle Java SE. The sources list no fixed version for Oracle GraalVM Enterprise Edition. Red Hat lists no fix planned for Red Hat Enterprise Linux 6 and no fix available for Red Hat Enterprise Linux 7, 8, 9 and Red Hat build of OpenJDK 1.8.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Advisory ·
Oracle GraalVM Enterprise Edition, Oracle Java SE — oracle.com/security-alerts/cpuoct2026.html
51 records Highest priority Priority LOW 51 LOW
Other records, highest priority first
- TI-2026-77455 Improper access control in Oracle Java SE and GraalVMPriority LOW 35
- TI-2026-77105 Improper access control in Oracle Java SE networking componentPriority LOW 35
- TI-2026-77828 Improper access control in Oracle Java SEPriority LOW 34
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix yet |
| Red Hat Enterprise Linux 8 | Affected | No fix yet |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat build of OpenJDK 1.8 | Affected | No fix yet |
Not affected: 8 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
- Red Hat Hardened Images
- Red Hat build of OpenJDK 11 ELS
- Red Hat build of OpenJDK 17
- Red Hat build of OpenJDK 21
- Red Hat build of OpenJDK 25
Timeline
- 2026-10-21 Threatist record created from CVE-2026-91417
- 2026-10-21 Alias added: GHSA-23j9-f78g-rw77
- 2026-10-21 Affected versions changed · Red Hat
- 2026-10-21 CVSS score added · Red Hat
- 2026-10-22 Affected versions changed · Red Hat
- 2026-10-22 Weakness changed · CISA ADP
- 2026-10-22 CISA SSVC decision points changed
- 2026-10-23 Affected versions changed · Red Hat
References
Advisory 1
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Sources
- CVE-2026-91417 · CVE Program
- CVE-2026-91417 · NVD
- FIRST EPSS
- GHSA-23j9-f78g-rw77 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-91417 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences