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...

CVE-2026-53869 Hermes Agent < 0.16.0 - DNS Rebinding Bypass via WebSocket Endpoints

Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling...

CVE-2026-53869

CVE-2026-53869 : Hermes Agent prior to 0.16.0 has a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. The FastAPI HTTP middleware is not executed for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events, ena...

CVE-2026-53869 Hermes Agent < 0.16.0 - DNS Rebinding Bypass via WebSocket Endpoints

Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling...

CVE-2026-53870: Incorrect Default Permissions

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...

PT-2026-50523

Name of the Vulnerable Software and Affected Versions Hermes WebUI versions prior to 0.51.443 Description An authorization bypass exists in the session export endpoint, allowing authenticated users to access sessions belonging to other profiles. The handle session export function in 'api/routes.p...

CVE-2026-55196: Missing Authentication for Critical Function

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-2026-53869: Missing Authentication for Critical Function

Hermes Agent before 0.16.0 contains a DNS rebinding vulnerability in WebSocket endpoints that allows remote attackers to bypass Host and Origin validation. FastAPI HTTP middleware does not execute for WebSocket upgrade requests on /api/pty, /api/ws, /api/pub, and /api/events endpoints, enabling...

CVE-2026-53871: Reliance on Cookies without Validation and Integrity Checking

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-2026-55198: Authorization Bypass Through User-Controlled Key

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: Authorization Bypass Through User-Controlled Key

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...

PT-2026-50519

Name of the Vulnerable Software and Affected Versions Hermes Agent versions prior to 0.16.0 Description The software creates response store.db and webhook subscriptions.json files with world-readable permissions mode 0o644. This configuration allows local users with filesystem access to read thes...

PT-2026-50518

Name of the Vulnerable Software and Affected Versions Hermes Agent versions prior to 0.16.0 Description A DNS rebinding issue in WebSocket endpoints allows remote attackers to bypass Host and Origin validation. This occurs because FastAPI HTTP middleware does not execute for WebSocket upgrade...

PT-2026-50521

Name of the Vulnerable Software and Affected Versions Hermes WebUI versions prior to 0.51.409 Description An authentication bypass exists in passkey registration endpoints. When HERMES WEBUI PASSKEY=1 is enabled and no credentials exist, unauthenticated remote attackers can register arbitrary...

CVE-2026-49973

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the setpassword parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable netwo...

CVE-2026-49973

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the setpassword parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable netwo...

CVE-2026-49973 Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the setpassword parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable netwo...

CVE-2026-49973

CVE-2026-49973 affects Hermes WebUI prior to version 0.51.358. The issue is an improper access control in the settings API that allows unauthenticated remote attackers to hijack the initial setup by posting to the /api/settings endpoint using the _set_password parameter without origin restriction...

EUVD-2026-36306

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the setpassword parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable netwo...

CVE-2026-49973 Hermes WebUI < 0.51.358 Unauthenticated Password Takeover via /api/settings

Hermes WebUI before version 0.51.358 contains an improper access control vulnerability that allows unauthenticated remote attackers to hijack initial setup by submitting the setpassword parameter to the settings API endpoint without any network origin restriction. Attackers on any reachable netwo...