CVE-2026-73921: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in takeover of Helidon. in Oracle Corporation Helidon
CVE-2026-73921 is a critical vulnerability in Oracle Helidon versions 1.0.0 through 1.4.19 and version 1.4.20. It allows an unauthenticated attacker with network access via HTTP to fully compromise the Helidon product, potentially leading to complete takeover. The vulnerability affects confidentiality, integrity, and availability with a CVSS 3.1 base score of 9.8. Oracle has acknowledged the issue in their August 2026 Critical Security Patch Update advisory, which includes patches for affected versions.
AI Analysis
Technical Summary
This vulnerability in Oracle Helidon (Imperative Web Server component) enables an unauthenticated attacker with network access over HTTP to exploit the flaw easily and compromise the system. The affected versions are from 1.0.0 up to and including 1.4.19, as well as version 1.4.20. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and impacts to confidentiality, integrity, and availability rated high. Oracle's August 2026 Critical Security Patch Update addresses this vulnerability among many others.
Potential Impact
Successful exploitation allows an unauthenticated attacker to take over the Helidon product, impacting confidentiality, integrity, and availability severely. This could lead to full system compromise.
Mitigation Recommendations
Oracle has released security patches as part of the August 2026 Critical Security Patch Update that address this vulnerability. Users should apply these official patches promptly to remediate the issue. Oracle strongly recommends remaining on actively supported versions and applying security patches without delay.
CVE-2026-73921: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in takeover of Helidon. in Oracle Corporation Helidon
Description
CVE-2026-73921 is a critical vulnerability in Oracle Helidon versions 1.0.0 through 1.4.19 and version 1.4.20. It allows an unauthenticated attacker with network access via HTTP to fully compromise the Helidon product, potentially leading to complete takeover. The vulnerability affects confidentiality, integrity, and availability with a CVSS 3.1 base score of 9.8. Oracle has acknowledged the issue in their August 2026 Critical Security Patch Update advisory, which includes patches for affected versions.
CVSS v3.1
Score 9.8critical
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 in Oracle Helidon (Imperative Web Server component) enables an unauthenticated attacker with network access over HTTP to exploit the flaw easily and compromise the system. The affected versions are from 1.0.0 up to and including 1.4.19, as well as version 1.4.20. The CVSS 3.1 vector indicates network attack vector, low attack complexity, no privileges or user interaction required, and impacts to confidentiality, integrity, and availability rated high. Oracle's August 2026 Critical Security Patch Update addresses this vulnerability among many others.
Potential Impact
Successful exploitation allows an unauthenticated attacker to take over the Helidon product, impacting confidentiality, integrity, and availability severely. This could lead to full system compromise.
Mitigation Recommendations
Oracle has released security patches as part of the August 2026 Critical Security Patch Update that address this vulnerability. Users should apply these official patches promptly to remediate the issue. Oracle strongly recommends remaining on actively supported versions and applying security patches without delay.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-13T18:41:45.889Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspuaug2026.html","vendor":"Oracle"}]
Threat ID: 6a84cceec6e8be0332c397ee
Added to database: 08/18/2026, 21:21:50 UTC
Last enriched: 09/11/2026, 10:47:36 UTC
Last updated: 10/02/2026, 02:46:06 UTC
Views: 81
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.