CVE-2026-55198

Hermes WebUI prior to 0.51.443 contains an authorization bypass in the session export endpoint. The _handle_session_export handler in api/routes.py fails to verify active-profile ownership before serializing session data, allowing authenticated users to exfiltrate transcripts from other profiles ...

EUVD-2026-37779

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 handlesessionexport handler in api/routes.py fails to verify active-profile ownership before serializing session...

CVE-2026-55197 Hermes WebUI < 0.51.443 - Broken Access Control in /api/session Endpoint

Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that allows authenticated users to disclose cross-profile session transcripts. Attackers can bypass profile boundary checks by directly querying session IDs belonging to other profiles via GET...

CVE-2026-55197 Hermes WebUI < 0.51.443 - Broken Access Control in /api/session Endpoint

Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that allows authenticated users to disclose cross-profile session transcripts. Attackers can bypass profile boundary checks by directly querying session IDs belonging to other profiles via GET...

EUVD-2026-37778

Hermes WebUI before 0.51.443 contains a broken access control vulnerability in the /api/session endpoint that allows authenticated users to disclose cross-profile session transcripts. Attackers can bypass profile boundary checks by directly querying session IDs belonging to other profiles via GET...

CVE-2026-55197

Hermes WebUI before 0.51.443 has a broken access control weakness in the /api/session endpoint. Authenticated users can bypass profile boundaries and query session IDs from other profiles via GET /api/session?session_id=&messages=1 to retrieve unauthorized transcripts and metadata. This affects t...

CVE-2026-55196 Hermes WebUI < 0.51.409 - Unauthenticated Passkey Registration via Authentication Bypass

Hermes WebUI before 0.51.409 contains an authentication bypass vulnerability in passkey registration endpoints that allows unauthenticated remote attackers to register arbitrary passkeys. When HERMESWEBUIPASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options an...

EUVD-2026-37777

Hermes WebUI before 0.51.409 contains an authentication bypass vulnerability in passkey registration endpoints that allows unauthenticated remote attackers to register arbitrary passkeys. When HERMESWEBUIPASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options an...

CVE-2026-55196 Hermes WebUI < 0.51.409 - Unauthenticated Passkey Registration via Authentication Bypass

Hermes WebUI before 0.51.409 contains an authentication bypass vulnerability in passkey registration endpoints that allows unauthenticated remote attackers to register arbitrary passkeys. When HERMESWEBUIPASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options an...

CVE-2026-55196

Hermes WebUI prior to version 0.51.409 contains an authentication bypass in passkey registration. When HERMES_WEBUI_PASSKEY=1 is enabled with no existing credentials, POST /api/auth/passkey/register/options and POST /api/auth/passkey/register are accessible without authentication, allowing an att...

CVE-2026-53871 Hermes WebUI < 0.51.368 - Profile-Scoped Authorization Bypass via Forged hermes_profile Cookie

Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the getprofilecookie function that accepts unauthenticated profile names from the hermesprofile cookie. An authenticated attacker can forge the hermesprofile cookie value to bypass profile-scoped authorization checks a...

EUVD-2026-37776

Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the getprofilecookie function that accepts unauthenticated profile names from the hermesprofile cookie. An authenticated attacker can forge the hermesprofile cookie value to bypass profile-scoped authorization checks a...

CVE-2026-53871 Hermes WebUI < 0.51.368 - Profile-Scoped Authorization Bypass via Forged hermes_profile Cookie

Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the getprofilecookie function that accepts unauthenticated profile names from the hermesprofile cookie. An authenticated attacker can forge the hermesprofile cookie value to bypass profile-scoped authorization checks a...

CVE-2026-53871

Hermes WebUI prior to version 0.51.368 contains an authorization bypass in get_profile_cookie() that accepts unauthenticated profile names via the hermes_profile cookie. An authenticated attacker can forge the hermes_profile cookie to bypass profile-scoped authorization and access sessions, files...

CVE-2026-53870 Hermes Agent < 0.16.0 - Sensitive File Permission Vulnerability in Store Files

Hermes Agent before 0.16.0 creates responsestore.db and webhooksubscriptions.json with world-readable permissions mode 0o644, exposing conversation history and HMAC secrets to local users. Attackers with local filesystem access can read these files directly to obtain sensitive data including...

CVE-2026-53870 Hermes Agent < 0.16.0 - Sensitive File Permission Vulnerability in Store Files

Hermes Agent before 0.16.0 creates responsestore.db and webhooksubscriptions.json with world-readable permissions mode 0o644, exposing conversation history and HMAC secrets to local users. Attackers with local filesystem access can read these files directly to obtain sensitive data including...

EUVD-2026-37775

Hermes Agent before 0.16.0 creates responsestore.db and webhooksubscriptions.json with world-readable permissions mode 0o644, exposing conversation history and HMAC secrets to local users. Attackers with local filesystem access can read these files directly to obtain sensitive data including...

CVE-2026-53870

Hermes Agent before 0.16.0 creates response_store.db and webhook_subscriptions.json with world-readable permissions (0644), exposing conversation history, tool payloads, prompts, and per-route HMAC secrets to local users. Attackers with local filesystem access can read these files directly to obt...

GHSA-P5CP-R7RG-QPXC Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode

RAG ACL Bypass in Milvus Multitenancy Mode Summary This is a bypass of the fix for: - GHSA-h36f-rqpx-j5wx - CVE-2026-44560 - "Unauthorized File and Knowledge Base Content Access via RAG Vector Search" Open WebUI added collection-level ACL checks, but the patch can still be bypassed when Milvus...

Open WebUI: RAG ACL Bypass in Milvus Multitenancy Mode

RAG ACL Bypass in Milvus Multitenancy Mode Summary This is a bypass of the fix for: - GHSA-h36f-rqpx-j5wx - CVE-2026-44560 - "Unauthorized File and Knowledge Base Content Access via RAG Vector Search" Open WebUI added collection-level ACL checks, but the patch can still be bypassed when Milvus...