CVE-2026-44595

CVE-2026-44595 — YAMCS Unauthorized User Enumeration via IAM API Summary The IAM API endpoints listUsers, getUser, listGroups, getGroup in yamcs-core do not enforce the required SystemPrivilege.ControlAccess check. Any authenticated user — even one with no privileges — can enumerate all user...

CVE-2026-44596

CVE-2026-44596 — YAMCS No Rate Limiting on Authentication Endpoint Summary The authentication endpoint POST /auth/token in yamcs-core lacks any form of rate limiting, account lockout, or failed attempt throttling. An unauthenticated remote attacker can perform unlimited password guessing attempts...

Exploit for CVE-2026-55559

Yamcs reconfigureInstance YAML Injection RCE Unauthentica...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection via the LikeExpression process. An attacker can execute arbitrary operating system commands by supplying a crafted pattern containing unescaped characters that are injected into dynamically generated Java code a...

Improper Neutralization of Special Elements Used in a Template Engine

Overview Affected versions of this package are vulnerable to Improper Neutralization of Special Elements Used in a Template Engine via the templateArgs parameter in the createInstance process. An attacker can execute arbitrary commands on the host system by injecting malicious YAML content that...

CVE-2026-55559

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs inserts templateArgs from POST /api/instances and PATCH /api/instances/instance into YAML through VarStatement.append in yamcs-core/src/main/java/org/yamcs/templating/VarStatement.java without YAML-context escaping. The...

CVE-2026-55552

Yamcs is a mission control framework. Prior to 5.11.13, Yamcs StaticFileHandler.locateFile resolves an unauthenticated request path without using Path.normalize and Path.toAbsolutePath to confirm that the absolute path remains within the configured staticRoots. A path containing traversal segment...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization through the exportPackets process. An attacker can access sensitive telemetry data by sending an API request without specifying any packet names, which bypasses intended privilege checks and streams all available...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization via the IamApi endpoints responsible for role and privilege enumeration. An attacker can access sensitive security configuration data by sending authenticated requests to GET /api/roles, GET /api/roles/name, or GET...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization in the WebSocket subscription handlers for packets, algorithm-status, and mdb-changes. An attacker can access sensitive data by subscribing to these WebSocket topics without the privilege checks that are enforced i...

Yamcs Core API has Multiple Missing Function Level Access Control vulnerabilities

Summary Multiple Missing Function Level Access Control vulnerabilities exist in the Yamcs Core API. These vulnerabilities allow any authenticated user, regardless of their assigned roles or privileges e.g., an unprivileged "Guest", to bypass intended access controls. An attacker can exploit these...

GHSA-962X-CCWF-8X6P Yamcs Core API has Multiple Missing Function Level Access Control vulnerabilities

Summary Multiple Missing Function Level Access Control vulnerabilities exist in the Yamcs Core API. These vulnerabilities allow any authenticated user, regardless of their assigned roles or privileges e.g., an unprivileged "Guest", to bypass intended access controls. An attacker can exploit these...

EUVD-2026-67838

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs omits authorization checks in IndexesApi.listPacketIndex, IndexesApi.listEventIndex, Cop1Api.disable, Cop1Api.resume, Cop1Api.initialize, Cop1Api.updateConfig, and TimeApi.setTime. An authenticated low-privilege user can read...

CVE-2026-55521 Yamcs : Multiple Missing Function Level Access Control vulnerabilities in Yamcs Core API

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs omits authorization checks in IndexesApi.listPacketIndex, IndexesApi.listEventIndex, Cop1Api.disable, Cop1Api.resume, Cop1Api.initialize, Cop1Api.updateConfig, and TimeApi.setTime. An authenticated low-privilege user can read...

CVE-2026-55521 Yamcs : Multiple Missing Function Level Access Control vulnerabilities in Yamcs Core API

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, Yamcs omits authorization checks in IndexesApi.listPacketIndex, IndexesApi.listEventIndex, Cop1Api.disable, Cop1Api.resume, Cop1Api.initialize, Cop1Api.updateConfig, and TimeApi.setTime. An authenticated low-privilege user can read...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection in the executeSql process. An attacker can execute arbitrary code with the privileges of the server process by injecting malicious Java code into a column name, which is then compiled and executed by the...

CVE-2026-44596

Summary (CVE-2026-44596) Yamcs’ authentication endpoint POST /auth/token (in yamcs-core) lacked rate limiting, account lockout, and throttling for failed attempts prior to v5.12.7. An unauthenticated remote attacker could perform unlimited password-guessing against any user account, enabling brut...

CVE-2026-44596 Yamcs: No Rate Limiting on Authentication Endpoint

Yamcs is a mission control framework. Prior to 5.12.7, the authentication endpoint POST /auth/token in yamcs-core, handled by yamcs-core/src/main/java/org/yamcs/http/auth/AuthHandler.java, lacked any rate limiting, account lockout, or failed-attempt throttling, so an unauthenticated remote attack...

EUVD-2026-44956

Yamcs is a mission control framework. Prior to 5.12.7, the authentication endpoint POST /auth/token in yamcs-core, handled by yamcs-core/src/main/java/org/yamcs/http/auth/AuthHandler.java, lacked any rate limiting, account lockout, or failed-attempt throttling, so an unauthenticated remote attack...

CVE-2026-44595: Missing Authorization

Yamcs is a mission control framework. Prior to 5.12.7, the IAM API endpoints listUsers, getUser, listGroups, and getGroup in yamcs-core did not enforce the required SystemPrivilege.ControlAccess check in yamcs-core/src/main/java/org/yamcs/http/api/IamApi.java, so any authenticated user, even one...