CVE-2026-58174
MediumCVSS 6.5Exploitation Probability (EPSS)
Low risk18th percentile — higher than 18% of all known CVEs
Summary
A vulnerability in Hermes WebUI before version 0.51.521 allows bypassing profile isolation. When importing a session, the workspace of the active named profile is validated, but the Session object is created without setting its profile, resulting in the session being persisted with a null profile. A null profile is treated as the default profile, enabling a user on the default profile to export the session transcript and read files from the named profile's workspace.
Risk Assessment
The organization is at risk of profile isolation breach, potentially leading to unauthorized access to files in other profiles' workspaces. An attacker on the default profile can read sensitive data from a named profile.
Recommendation
Immediately update Hermes WebUI to version 0.51.521 or later. If an update is not possible, restrict access to the session import functionality to trusted users only.
Original NVD description (English source)
Hermes WebUI before 0.51.521 validates the workspace of an imported session under the active named profile but constructs the Session object without setting its profile in the /api/session/import handler, so the imported session is persisted with a null profile. Because a null profile is treated as the default profile by the profile authorization check, a user on the default profile can export the imported session transcript and use its session identifier to read files from the named profile's workspace, defeating the application's profile isolation.