CVE-2026-55198

MediumCVSS 6.5/10Last modified Oct 26, 2026

Description

Hermes WebUI before 0.51.443 contains an authorization bypass vulnerability in the session export endpoint that allows authenticated users to access sessions from other profiles. The _handle_session_export handler in api/routes.py fails to verify active-profile ownership before serializing session data, enabling attackers to exfiltrate foreign session transcripts by guessing or knowing session identifiers.

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Weakness enumeration

CWE-639

Affected software

Vendor	Product	Versions
nesquena	hermes-webui	< 0.51.443

References

Timeline

Published: Jun 17, 2026
Last modified: Oct 26, 2026
NVD status: Deferred

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