CVE-2026-73909: Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data. in Oracle Corporation Helidon
CVE-2026-73909 is a vulnerability in Oracle Helidon versions 3.0.0 through 3.2.18 and 3.2.19 that allows an unauthenticated attacker with network access via HTTP to potentially gain unauthorized access to critical or all accessible data. The vulnerability is difficult to exploit and impacts confidentiality without affecting integrity or availability. The CVSS 3.1 base score is 5.9, indicating a medium severity. Oracle has included this vulnerability in its August 2026 Critical Security Patch Update, which provides security patches for affected versions.
AI Analysis
Technical Summary
This vulnerability affects the Imperative Web Server component of Oracle Helidon, specifically versions 3.0.0 through 3.2.18 and 3.2.19. An unauthenticated attacker with network access over HTTP could exploit this issue to gain unauthorized access to sensitive data within Helidon. The vulnerability is rated with a CVSS 3.1 score of 5.9, reflecting a medium severity with a high confidentiality impact but no impact on integrity or availability. Oracle has addressed this vulnerability in its August 2026 Critical Security Patch Update, which includes patches for Helidon versions 3.0.0 through 3.2.19.
Potential Impact
Successful exploitation can lead to unauthorized access to critical or all data accessible through Helidon, compromising confidentiality. There is no reported impact on data integrity or system availability. The vulnerability requires network access via HTTP and is considered difficult to exploit.
Mitigation Recommendations
Oracle has released security patches for Helidon versions 3.0.0 through 3.2.19 as part of the August 2026 Critical Security Patch Update. It is strongly recommended to apply these patches promptly to mitigate the vulnerability. Customers should remain on actively supported versions and apply Oracle patches without delay. No additional vendor advisory states that no action is required or that the issue is already mitigated without patching.
CVE-2026-73909: Difficult to exploit vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized access to critical data or complete access to all Helidon accessible data. in Oracle Corporation Helidon
Description
CVE-2026-73909 is a vulnerability in Oracle Helidon versions 3.0.0 through 3.2.18 and 3.2.19 that allows an unauthenticated attacker with network access via HTTP to potentially gain unauthorized access to critical or all accessible data. The vulnerability is difficult to exploit and impacts confidentiality without affecting integrity or availability. The CVSS 3.1 base score is 5.9, indicating a medium severity. Oracle has included this vulnerability in its August 2026 Critical Security Patch Update, which provides security patches for affected versions.
CVSS v3.1
Score 5.9medium
Affected software
Oracle Corporation
Helidon
Run 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 Imperative Web Server component of Oracle Helidon, specifically versions 3.0.0 through 3.2.18 and 3.2.19. An unauthenticated attacker with network access over HTTP could exploit this issue to gain unauthorized access to sensitive data within Helidon. The vulnerability is rated with a CVSS 3.1 score of 5.9, reflecting a medium severity with a high confidentiality impact but no impact on integrity or availability. Oracle has addressed this vulnerability in its August 2026 Critical Security Patch Update, which includes patches for Helidon versions 3.0.0 through 3.2.19.
Potential Impact
Successful exploitation can lead to unauthorized access to critical or all data accessible through Helidon, compromising confidentiality. There is no reported impact on data integrity or system availability. The vulnerability requires network access via HTTP and is considered difficult to exploit.
Mitigation Recommendations
Oracle has released security patches for Helidon versions 3.0.0 through 3.2.19 as part of the August 2026 Critical Security Patch Update. It is strongly recommended to apply these patches promptly to mitigate the vulnerability. Customers should remain on actively supported versions and apply Oracle patches without delay. No additional vendor advisory states that no action is required or that the issue is already mitigated without patching.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-13T18:41:45.887Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspuaug2026.html","vendor":"Oracle"}]
Threat ID: 6a84ccebc6e8be0332c396da
Added to database: 08/18/2026, 21:21:47 UTC
Last enriched: 09/11/2026, 10:49:31 UTC
Last updated: 10/03/2026, 02:46:06 UTC
Views: 56
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.