CVE-2026-87289: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. in Oracle Corporation Helidon
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-static-content). Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
AI Analysis
Technical Summary
This vulnerability affects the helidon-webserver-static-content component of Oracle Helidon. An unauthenticated attacker can exploit this flaw remotely over HTTP to cause the Helidon service to hang or crash repeatedly, leading to a complete denial of service. The CVSS 3.1 base score is 7.5, reflecting a high impact on availability with no impact on confidentiality or integrity. The affected versions are 4.0.0 through 4.5.4 inclusive. Oracle has included fixes for this vulnerability in their September 2026 Critical Security Patch Update, which covers Helidon versions 3.0.0-3.2.20 and 4.0.0-4.5.4.
Potential Impact
Successful exploitation results in unauthorized denial of service by causing the Helidon server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability is remotely exploitable without authentication via HTTP.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Users of Helidon versions 4.0.0 through 4.5.4 should apply the available security patches promptly to remediate this issue. Oracle strongly recommends staying on actively supported versions and applying security patches without delay.
CVE-2026-87289: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. in Oracle Corporation Helidon
Description
Vulnerability in the Helidon product of Oracle Fusion Middleware (component: helidon-webserver-static-content). Supported versions that are affected are 4.0.0-4.5.4. Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized ability to cause a hang or frequently repeatable crash (complete DOS) of Helidon. CVSS 3.1 Base Score 7.5 (Availability impacts). CVSS Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).
CVSS v3.1
Score 7.5high
Affected software
Oracle Corporation
Helidon
pkg:maven/io.helidon/helidon-webserver-static-contentRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the helidon-webserver-static-content component of Oracle Helidon. An unauthenticated attacker can exploit this flaw remotely over HTTP to cause the Helidon service to hang or crash repeatedly, leading to a complete denial of service. The CVSS 3.1 base score is 7.5, reflecting a high impact on availability with no impact on confidentiality or integrity. The affected versions are 4.0.0 through 4.5.4 inclusive. Oracle has included fixes for this vulnerability in their September 2026 Critical Security Patch Update, which covers Helidon versions 3.0.0-3.2.20 and 4.0.0-4.5.4.
Potential Impact
Successful exploitation results in unauthorized denial of service by causing the Helidon server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability is remotely exploitable without authentication via HTTP.
Mitigation Recommendations
Oracle has released patches for this vulnerability as part of the September 2026 Critical Security Patch Update. Users of Helidon versions 4.0.0 through 4.5.4 should apply the available security patches promptly to remediate this issue. Oracle strongly recommends staying on actively supported versions and applying security patches without delay.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-09-08T21:49:12.409Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspusep2026.html","vendor":"Oracle"}]
Threat ID: 6aa9a86b55bf5e2cf553b2fe
Added to database: 09/15/2026, 20:19:55 UTC
Last enriched: 09/15/2026, 20:31:30 UTC
Last updated: 09/16/2026, 03:03:35 UTC
Views: 5
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