CVE-2026-73890: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 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
CVE-2026-73890 is a high-severity vulnerability in Oracle Helidon versions 4.0.0 through 4.4.1 and version 4.5.0. It allows an unauthenticated attacker with network access via HTTP/2 to cause a denial of service by hanging or crashing the Helidon server. The vulnerability impacts availability but does not affect confidentiality or integrity.
AI Analysis
Technical Summary
This vulnerability affects the Imperative Web Server component of Oracle Helidon. An unauthenticated attacker can exploit this flaw remotely over HTTP/2 to cause the Helidon server to hang or crash repeatedly, resulting in a complete denial of service. The CVSS 3.1 base score is 7.5, reflecting the ease of exploitation and the impact on availability. The affected versions are 4.0.0 through 4.4.1 inclusive, and 4.5.0. Oracle has published a Critical Security Patch Update advisory referencing this vulnerability but does not explicitly confirm patch availability for these versions in the provided content.
Potential Impact
Successful exploitation results in a denial of service condition by causing the Helidon server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability can be exploited remotely without authentication via HTTP/2.
Mitigation Recommendations
Oracle recommends applying security patches promptly as part of their Critical Security Patch Update process. However, the provided advisory content does not explicitly confirm a patch for this specific vulnerability. Users should consult the Oracle Critical Security Patch Update advisory at https://www.oracle.com/security-alerts/cspuaug2026.html for the latest patch availability and installation instructions. Until patched, restricting network access to the Helidon HTTP/2 interface may reduce exposure.
CVE-2026-73890: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP/2 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
CVE-2026-73890 is a high-severity vulnerability in Oracle Helidon versions 4.0.0 through 4.4.1 and version 4.5.0. It allows an unauthenticated attacker with network access via HTTP/2 to cause a denial of service by hanging or crashing the Helidon server. The vulnerability impacts availability but does not affect confidentiality or integrity.
CVSS v3.1
Score 7.5high
Affected software
Oracle Corporation
Helidon
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Imperative Web Server component of Oracle Helidon. An unauthenticated attacker can exploit this flaw remotely over HTTP/2 to cause the Helidon server to hang or crash repeatedly, resulting in a complete denial of service. The CVSS 3.1 base score is 7.5, reflecting the ease of exploitation and the impact on availability. The affected versions are 4.0.0 through 4.4.1 inclusive, and 4.5.0. Oracle has published a Critical Security Patch Update advisory referencing this vulnerability but does not explicitly confirm patch availability for these versions in the provided content.
Potential Impact
Successful exploitation results in a denial of service condition by causing the Helidon server to hang or crash repeatedly. There is no impact on confidentiality or integrity. The vulnerability can be exploited remotely without authentication via HTTP/2.
Mitigation Recommendations
Oracle recommends applying security patches promptly as part of their Critical Security Patch Update process. However, the provided advisory content does not explicitly confirm a patch for this specific vulnerability. Users should consult the Oracle Critical Security Patch Update advisory at https://www.oracle.com/security-alerts/cspuaug2026.html for the latest patch availability and installation instructions. Until patched, restricting network access to the Helidon HTTP/2 interface may reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-13T18:41:45.884Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspuaug2026.html","vendor":"Oracle"}]
Threat ID: 6a84cce5c6e8be0332c39597
Added to database: 08/18/2026, 21:21:41 UTC
Last enriched: 09/11/2026, 11:02:17 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 57
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