CVE-2026-73900: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Helidon accessible data. in Oracle Corporation Helidon
CVE-2026-73900 is a vulnerability in Oracle Helidon versions 4.0.0 through 4.5.0 and version 4.5.1. It allows an unauthenticated attacker with network access via HTTP to gain unauthorized read access to some Helidon accessible data. The vulnerability has a CVSS 3.1 base score of 5.3, indicating a medium severity with confidentiality impact only. 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 Oracle Helidon, specifically the Imperative Web Server component, in versions 4.0.0 through 4.5.0 and 4.5.1. An unauthenticated attacker with network access via HTTP can exploit this flaw to read a subset of data accessible through Helidon without authorization. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, indicating network attack vector, low attack complexity, no privileges or user interaction required, and confidentiality impact only. Oracle has addressed this vulnerability in its August 2026 Critical Security Patch Update.
Potential Impact
Successful exploitation results in unauthorized read access to a subset of data accessible via Helidon, impacting confidentiality. There is no impact on integrity or availability. The vulnerability is exploitable remotely without authentication, increasing risk exposure.
Mitigation Recommendations
Oracle has released security patches for this vulnerability as part of the August 2026 Critical Security Patch Update. Users should apply the official patches promptly to remediate the issue. Oracle strongly recommends remaining on actively supported versions and applying security patches without delay. No alternative mitigations or temporary fixes are indicated in the advisory.
CVE-2026-73900: Easily exploitable vulnerability allows unauthenticated attacker with network access via HTTP to compromise Helidon. Successful attacks of this vulnerability can result in unauthorized read access to a subset of Helidon accessible data. in Oracle Corporation Helidon
Description
CVE-2026-73900 is a vulnerability in Oracle Helidon versions 4.0.0 through 4.5.0 and version 4.5.1. It allows an unauthenticated attacker with network access via HTTP to gain unauthorized read access to some Helidon accessible data. The vulnerability has a CVSS 3.1 base score of 5.3, indicating a medium severity with confidentiality impact only. Oracle has included this vulnerability in its August 2026 Critical Security Patch Update, which provides security patches for affected versions.
CVSS v3.1
Score 5.3medium
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 Oracle Helidon, specifically the Imperative Web Server component, in versions 4.0.0 through 4.5.0 and 4.5.1. An unauthenticated attacker with network access via HTTP can exploit this flaw to read a subset of data accessible through Helidon without authorization. The CVSS 3.1 vector is AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N, indicating network attack vector, low attack complexity, no privileges or user interaction required, and confidentiality impact only. Oracle has addressed this vulnerability in its August 2026 Critical Security Patch Update.
Potential Impact
Successful exploitation results in unauthorized read access to a subset of data accessible via Helidon, impacting confidentiality. There is no impact on integrity or availability. The vulnerability is exploitable remotely without authentication, increasing risk exposure.
Mitigation Recommendations
Oracle has released security patches for this vulnerability as part of the August 2026 Critical Security Patch Update. Users should apply the official patches promptly to remediate the issue. Oracle strongly recommends remaining on actively supported versions and applying security patches without delay. No alternative mitigations or temporary fixes are indicated in the advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-13T18:41:45.885Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspuaug2026.html","vendor":"Oracle"}]
Threat ID: 6a84cce7c6e8be0332c3965a
Added to database: 08/18/2026, 21:21:43 UTC
Last enriched: 09/11/2026, 11:03:19 UTC
Last updated: 10/02/2026, 14:46:10 UTC
Views: 67
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.