CVE-2026-49956: Missing Authorization in nesquena hermes-webui
Hermes WebUI before version 0.51.269 contains a profile isolation bypass vulnerability that allows authenticated users to access data belonging to other profiles by querying the session search endpoint without active-profile filtering. Attackers can send requests to the sessions search handler to retrieve session titles and transcript message content from profiles other than their own active profile.
AI Analysis
Technical Summary
CVE-2026-49956 is a vulnerability in nesquena's Hermes WebUI prior to version 0.51.269. It involves missing authorization checks on the session search endpoint, enabling authenticated users to bypass profile isolation controls. Attackers can retrieve session titles and transcript message content from profiles other than their own active profile, violating data confidentiality boundaries.
Potential Impact
The vulnerability allows authenticated users to access sensitive session data belonging to other profiles, potentially exposing private information such as session titles and transcript messages. This breach of profile isolation compromises user data confidentiality within the affected application.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor vendor communications for updates. Until a fix is available, restrict access to the affected versions and consider limiting authenticated user permissions to reduce exposure.
CVE-2026-49956: Missing Authorization in nesquena hermes-webui
Description
Hermes WebUI before version 0.51.269 contains a profile isolation bypass vulnerability that allows authenticated users to access data belonging to other profiles by querying the session search endpoint without active-profile filtering. Attackers can send requests to the sessions search handler to retrieve session titles and transcript message content from profiles other than their own active profile.
CVSS v4.0
Score 7.1high
Affected software
pkg:github/nesquena/hermes-webuiRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-49956 is a vulnerability in nesquena's Hermes WebUI prior to version 0.51.269. It involves missing authorization checks on the session search endpoint, enabling authenticated users to bypass profile isolation controls. Attackers can retrieve session titles and transcript message content from profiles other than their own active profile, violating data confidentiality boundaries.
Potential Impact
The vulnerability allows authenticated users to access sensitive session data belonging to other profiles, potentially exposing private information such as session titles and transcript messages. This breach of profile isolation compromises user data confidentiality within the affected application.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or patch information is provided, users should monitor vendor communications for updates. Until a fix is available, restrict access to the affected versions and consider limiting authenticated user permissions to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-06-02T16:30:15.232Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a283e9b8dd33fbd8553f4b0
Added to database: 06/09/2026, 16:26:03 UTC
Last enriched: 07/15/2026, 10:08:34 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 68
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