CVE-2026-51538: n/a
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided session_handle exists in the global session list, but it fails to verify whether that handle belongs to the specific TCP connection issuing the request. Because there is no strong binding between a session handle and its originating socket, any attacker on the network can use a valid session handle created by another legitimate client to bypass access controls.
AI Analysis
Technical Summary
The vulnerability in EIPStackGroup OpENer 2.3.0 (commit 76b95cf) arises because the server processes encapsulation commands by checking only the existence of the session_handle in the global session list without verifying the association between the session handle and the originating TCP connection. This lack of strong binding enables an attacker to use a valid session handle created by a legitimate client to bypass access controls, potentially allowing unauthorized access to encapsulation sessions.
Potential Impact
An attacker on the network can reuse valid session handles from other clients to bypass access controls, potentially gaining unauthorized access to encapsulation sessions. This could lead to unauthorized commands being accepted by the server, compromising the integrity and confidentiality of the communication sessions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround has been provided at this time.
CVE-2026-51538: n/a
Description
EIPStackGroup OpENer 2.3.0 (commit 76b95cf) suffers from an Incorrect Access Control vulnerability in its handling of encapsulation sessions. When the server processes critical encapsulation commands, it verifies whether the provided session_handle exists in the global session list, but it fails to verify whether that handle belongs to the specific TCP connection issuing the request. Because there is no strong binding between a session handle and its originating socket, any attacker on the network can use a valid session handle created by another legitimate client to bypass access controls.
CVSS v3.1
Score 9.1critical
Affected software
pkg:github/eipstackgroup/OpENerRun 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
The vulnerability in EIPStackGroup OpENer 2.3.0 (commit 76b95cf) arises because the server processes encapsulation commands by checking only the existence of the session_handle in the global session list without verifying the association between the session handle and the originating TCP connection. This lack of strong binding enables an attacker to use a valid session handle created by a legitimate client to bypass access controls, potentially allowing unauthorized access to encapsulation sessions.
Potential Impact
An attacker on the network can reuse valid session handles from other clients to bypass access controls, potentially gaining unauthorized access to encapsulation sessions. This could lead to unauthorized commands being accepted by the server, compromising the integrity and confidentiality of the communication sessions.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or workaround has been provided at this time.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mitre
- Date Reserved
- 2026-06-08T00:00:00.000Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a555d1568715ace43ecaaf4
Added to database: 07/13/2026, 21:48:05 UTC
Last enriched: 07/13/2026, 22:03:39 UTC
Last updated: 08/26/2026, 04:33:37 UTC
Views: 45
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