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Vulnerabilities CVE-2026-55198

CVE-2026-55198

High
Open
TLP:CLEAR

Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltration via Session Export Endpoint

NVD CVE.org
Data Exfiltration

AI Analysis

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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.

Details

CVSS Score
7.1
EPSS Score
0.27%

19.4th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Confidence
90%
Published
Jun 17, 2026
Last Modified
Jul 14, 2026
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