Hermes WebUI < 0.51.269 Profile Isolation Bypass via sessions search
CVE-2026-49956

7.1HIGH

Key Information:

Vendor

Nesquena

Status
Hermes-webui
Vendor
CVE Published:
9 June 2026

What is CVE-2026-49956?

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.

Affected Version(s)

hermes-webui 0

References

https://github.com/nesquena/hermes-webui/releases/tag/v0....
release-notes
https://github.com/nesquena/hermes-webui/pull/3646
technical-description
https://github.com/nesquena/hermes-webui/pull/3672
issue-tracking

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Chia Min Jun Lennon
.