CVE-2026-73903: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Helidon accessible data. in Oracle Corporation Helidon
CVE-2026-73903 is a high-severity vulnerability in Oracle Helidon version 4.5.1. It allows an unauthenticated attacker with network access via HTTP to compromise the system, resulting in unauthorized creation, deletion, or modification of critical or all accessible data. The vulnerability has a CVSS 3.1 base score of 7.5, indicating a significant integrity impact without affecting confidentiality or availability. Oracle has included this vulnerability in its August 2026 Critical Security Patch Update, which addresses numerous security issues across multiple products, including Helidon. The vendor strongly recommends applying available patches promptly to mitigate risks.
AI Analysis
Technical Summary
This vulnerability affects Oracle Helidon version 4.5.1, specifically in the Imperative Web Server component. It allows an unauthenticated attacker to exploit the system remotely over HTTP, leading to unauthorized modification of critical data. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) confirms network attack vector, low attack complexity, no privileges or user interaction required, and high integrity impact. Oracle has published a Critical Security Patch Update in August 2026 that includes fixes for this and other vulnerabilities. The advisory emphasizes the importance of applying patches promptly to prevent exploitation.
Potential Impact
Successful exploitation of this vulnerability can lead to unauthorized creation, deletion, or modification of critical data or all data accessible through Helidon. This compromises data integrity but does not impact confidentiality or availability. The vulnerability can be exploited remotely without authentication or user interaction, increasing its risk.
Mitigation Recommendations
Oracle has released a Critical Security Patch Update in August 2026 that addresses this vulnerability among others. Customers running Helidon version 4.5.1 should apply the relevant patches from this update without delay. Oracle strongly recommends remaining on actively supported versions and promptly applying security patches to mitigate exploitation risks. Patch status is confirmed by the vendor advisory indicating that fixes are available in the August 2026 update.
CVE-2026-73903: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized creation, deletion or modification access to critical data or all Helidon accessible data. in Oracle Corporation Helidon
Description
CVE-2026-73903 is a high-severity vulnerability in Oracle Helidon version 4.5.1. It allows an unauthenticated attacker with network access via HTTP to compromise the system, resulting in unauthorized creation, deletion, or modification of critical or all accessible data. The vulnerability has a CVSS 3.1 base score of 7.5, indicating a significant integrity impact without affecting confidentiality or availability. Oracle has included this vulnerability in its August 2026 Critical Security Patch Update, which addresses numerous security issues across multiple products, including Helidon. The vendor strongly recommends applying available patches promptly to mitigate risks.
CVSS v3.1
Score 7.5high
Affected software
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects Oracle Helidon version 4.5.1, specifically in the Imperative Web Server component. It allows an unauthenticated attacker to exploit the system remotely over HTTP, leading to unauthorized modification of critical data. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N) confirms network attack vector, low attack complexity, no privileges or user interaction required, and high integrity impact. Oracle has published a Critical Security Patch Update in August 2026 that includes fixes for this and other vulnerabilities. The advisory emphasizes the importance of applying patches promptly to prevent exploitation.
Potential Impact
Successful exploitation of this vulnerability can lead to unauthorized creation, deletion, or modification of critical data or all data accessible through Helidon. This compromises data integrity but does not impact confidentiality or availability. The vulnerability can be exploited remotely without authentication or user interaction, increasing its risk.
Mitigation Recommendations
Oracle has released a Critical Security Patch Update in August 2026 that addresses this vulnerability among others. Customers running Helidon version 4.5.1 should apply the relevant patches from this update without delay. Oracle strongly recommends remaining on actively supported versions and promptly applying security patches to mitigate exploitation risks. Patch status is confirmed by the vendor advisory indicating that fixes are available in the August 2026 update.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-13T18:41:45.886Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspuaug2026.html","vendor":"Oracle"}]
Threat ID: 6a84cce7c6e8be0332c39660
Added to database: 08/18/2026, 21:21:43 UTC
Last enriched: 08/18/2026, 21:50:19 UTC
Last updated: 08/18/2026, 22:29:41 UTC
Views: 2
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