Medium severity6.5NVD Advisory· Published Jun 17, 2026· Updated Jun 17, 2026
CVE-2026-55198
CVE-2026-55198
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
1- Range: <0.51.443
Patches
Vulnerability mechanics
References
5- github.com/nesquena/hermes-webui/commit/2a3baa71b81ca92da8ece8616a09f15894beec71nvd
- github.com/nesquena/hermes-webui/pull/3991nvd
- github.com/nesquena/hermes-webui/pull/4269nvd
- github.com/nesquena/hermes-webui/releases/tag/v0.51.443nvd
- www.vulncheck.com/advisories/hermes-webui-cross-profile-session-data-exfiltration-via-session-export-endpointnvd
News mentions
1- Hermes WebUI: Three Auth Bypass CVEs Disclosed TogetherVypr Intelligence · Jun 17, 2026