EUVD-2026-37904

Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint that allows unbounded accumulation of in-memory flow state and daemon threads. Attackers can send repeated or concurrent requests to exhaust server memory and...

CVE-2026-55205 Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint

Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint that allows unbounded accumulation of in-memory flow state and daemon threads. Attackers can send repeated or concurrent requests to exhaust server memory and...

CVE-2026-55205

Hermes WebUI prior to 0.51.468 is affected by a resource-exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint. The issue allows unbounded accumulation of in-memory flow state and daemon threads, enabling repeated or concurrent requests to exhaust server memory...

CVE-2026-55205 Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint

Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint that allows unbounded accumulation of in-memory flow state and daemon threads. Attackers can send repeated or concurrent requests to exhaust server memory and...

CVE-2026-55205 Hermes WebUI < 0.51.468 - Resource Exhaustion via Unauthenticated OAuth Flow Endpoint

Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint that allows unbounded accumulation of in-memory flow state and daemon threads. Attackers can send repeated or concurrent requests to exhaust server memory and...

CVE-2026-55205: Allocation of Resources Without Limits or Throttling

Hermes WebUI before 0.51.468 contains a resource exhaustion vulnerability in the unauthenticated POST /api/onboarding/oauth/start endpoint that allows unbounded accumulation of in-memory flow state and daemon threads. Attackers can send repeated or concurrent requests to exhaust server memory and...

CVE-2026-54017: Improper Limitation of a Pathname to a Restricted Directory

Open WebUI is a self-hosted artificial intelligence platform designed to operate entirely offline. Prior to 0.9.6, the terminal-server reverse proxy in backend/openwebui/routers/terminals.py does not fully confine the user-controlled path segment before forwarding it to an admin-configured termin...

CVE-2026-55197

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-2026-55196

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-2026-55198

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...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-54022 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-54022 Source advisory: OSV:GHSA-8788-J68R-3CGH...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-54022 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-54022 Source advisory: SNYK:PYTHON-OPENWEBUI-17400356...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-54022 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-54022 Source advisory: GHSA-8788-J68R-3CGH...

Incorrect Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Incorrect Authorization in the ydoc:document:join process. An attacker can access private note contents belonging to other users by joining a document room using an alternate document ID format that bypasses...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-54021 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-54021 Source advisory: OSV:GHSA-9RPJ-V7HF-VV2W...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-54021 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-54021 Source advisory: GHSA-9RPJ-V7HF-VV2W...

Incorrect Authorization

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Incorrect Authorization through the getollamaurl process. An attacker can gain unauthorized access to restricted backend resources by supplying a crafted urlidx path parameter to route requests to internal or...

openwebui-token-tracking (0.1.7) potentially affected by CVE-2026-54021 via open-webui (0.6.0)

open-webui PYPI version 0.6.0 is affected by a known vulnerability. The following packages have a transitive dependency on open-webui and may be impacted: - openwebui-token-tracking 0.1.7 Source cves: CVE-2026-54021 Source advisory: SNYK:PYTHON-OPENWEBUI-17400352...

CVE-2026-55198 Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltration via Session Export Endpoint

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-2026-55198 Hermes WebUI < 0.51.443 - Cross-Profile Session Data Exfiltration via Session Export Endpoint

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...