CVE-2026-73877: 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-2026-73877 is a vulnerability in Oracle Helidon versions 3.0.0 through 3.2.17 and 3.2.18 that allows an unauthenticated attacker with network access via HTTP to gain unauthorized read access to some data accessible by Helidon. 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 products including Helidon.
AI Analysis
Technical Summary
This vulnerability affects the Helidon product of Oracle Fusion Middleware, specifically the Imperative Web Server component. It allows an unauthenticated attacker with network access via HTTP to compromise Helidon and read a subset of accessible data 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 required, no user interaction, unchanged scope, and limited confidentiality impact. The affected versions are 3.0.0 through 3.2.17 inclusive, and version 3.2.18. 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 by Helidon, impacting confidentiality. There is no impact on integrity or availability. The vulnerability can be exploited remotely without authentication or user interaction, increasing exposure risk. However, the impact is limited to confidentiality and is rated medium severity.
Mitigation Recommendations
Oracle has released security patches for this vulnerability as part of the August 2026 Critical Security Patch Update. Users of affected Helidon versions (3.0.0 through 3.2.17 and 3.2.18) should apply the relevant patches promptly to remediate the vulnerability. Oracle strongly recommends staying on actively supported versions and applying security patches without delay. No alternative mitigations or workarounds are specified in the advisory.
CVE-2026-73877: 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-2026-73877 is a vulnerability in Oracle Helidon versions 3.0.0 through 3.2.17 and 3.2.18 that allows an unauthenticated attacker with network access via HTTP to gain unauthorized read access to some data accessible by Helidon. 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 products including Helidon.
CVSS v3.1
Score 5.3medium
Affected software
Oracle Corporation
Helidon
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability affects the Helidon product of Oracle Fusion Middleware, specifically the Imperative Web Server component. It allows an unauthenticated attacker with network access via HTTP to compromise Helidon and read a subset of accessible data 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 required, no user interaction, unchanged scope, and limited confidentiality impact. The affected versions are 3.0.0 through 3.2.17 inclusive, and version 3.2.18. 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 by Helidon, impacting confidentiality. There is no impact on integrity or availability. The vulnerability can be exploited remotely without authentication or user interaction, increasing exposure risk. However, the impact is limited to confidentiality and is rated medium severity.
Mitigation Recommendations
Oracle has released security patches for this vulnerability as part of the August 2026 Critical Security Patch Update. Users of affected Helidon versions (3.0.0 through 3.2.17 and 3.2.18) should apply the relevant patches promptly to remediate the vulnerability. Oracle strongly recommends staying on actively supported versions and applying security patches without delay. No alternative mitigations or workarounds are specified in the advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- oracle
- Date Reserved
- 2026-08-13T18:41:45.882Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.oracle.com/security-alerts/cspuaug2026.html","vendor":"Oracle"}]
Threat ID: 6a84ccdfc6e8be0332c39469
Added to database: 08/18/2026, 21:21:35 UTC
Last enriched: 09/11/2026, 11:18:21 UTC
Last updated: 10/03/2026, 02:46:06 UTC
Views: 24
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