GHSA-2G95-6X5Q-XJWJ Yamcs Vulnerable to Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection

Summary A Server-Side Code Injection vulnerability exists in the Yamcs script evaluation engine for Python algorithms. The application dynamically compiles and evaluates user-controlled algorithm text using Jython via the JSR-223 ScriptEngine API without enforcing a secure sandbox. An authenticat...

Yamcs Vulnerable to Authenticated Remote Code Execution (RCE) via Jython Algorithm Code Injection

Summary A Server-Side Code Injection vulnerability exists in the Yamcs script evaluation engine for Python algorithms. The application dynamically compiles and evaluates user-controlled algorithm text using Jython via the JSR-223 ScriptEngine API without enforcing a secure sandbox. An authenticat...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection via the dynamic evaluation of user-supplied algorithm code in the script evaluation engine. An attacker can execute arbitrary operating system commands by injecting malicious Jython code through the REST API whe...

Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')

Overview Affected versions of this package are vulnerable to Use of Externally-Controlled Input to Select Classes or Code 'Unsafe Reflection' via the updateAlgorithm process. An attacker can execute arbitrary code on the server by supplying crafted JavaScript payloads that are evaluated without...

Yamcs Vulnerable to Remote Code Execution via Mission Database algorithm override

Remote Code Execution via Mission Database algorithm override Summary The Nashorn ScriptEngine used to evaluate user-supplied algorithm text in MdbOverrideApi.updateAlgorithm is constructed without a ClassFilter, allowing a user with the ChangeMissionDatabase privilege to execute arbitrary Java...

GHSA-VMWP-VH32-RJ75 Yamcs Vulnerable to Remote Code Execution via Mission Database algorithm override

Remote Code Execution via Mission Database algorithm override Summary The Nashorn ScriptEngine used to evaluate user-supplied algorithm text in MdbOverrideApi.updateAlgorithm is constructed without a ClassFilter, allowing a user with the ChangeMissionDatabase privilege to execute arbitrary Java...

GHSA-524G-X36V-9WM6 Yamcs Vulnerable to Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory`

Summary A Server-Side Code Injection vulnerability exists in the Yamcs algorithm evaluation engine org.yamcs.algorithms.JavaExprAlgorithmExecutionFactory. The application dynamically compiles and evaluates user-controlled algorithm text without enforcing a secure sandbox. An authenticated user wi...

Arbitrary Code Injection

Overview Affected versions of this package are vulnerable to Arbitrary Code Injection in the JavaExprAlgorithmExecutionFactory process. An attacker can execute arbitrary code on the underlying operating system by injecting malicious Java expressions through the REST API when authenticated with th...

Yamcs Vulnerable to Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory`

Summary A Server-Side Code Injection vulnerability exists in the Yamcs algorithm evaluation engine org.yamcs.algorithms.JavaExprAlgorithmExecutionFactory. The application dynamically compiles and evaluates user-controlled algorithm text without enforcing a secure sandbox. An authenticated user wi...

GHSA-W5R6-MCGQ-7PQ4 Yamcs has 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. As a result, an unauthenticated remote attacker can perform unlimited password guessing attempts against any user account. This missing rate limiting...

Brute Force

Overview Affected versions of this package are vulnerable to Brute Force through the handleToken process. An attacker can gain unauthorized access to user accounts by performing unlimited authentication attempts without restriction. PoC 20 attempts — zero rate limiting for i in $seq 1 20; do curl...

Yamcs has 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. As a result, an unauthenticated remote attacker can perform unlimited password guessing attempts against any user account. This missing rate limiting...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization in the IAM API endpoints, including listUsers, getUser, listGroups, and getGroup. An attacker can retrieve sensitive user information, such as usernames, superuser status, and group memberships, by sending...

GHSA-P2RJ-MRMC-9W29 Yamcs vulnerable to unauthorized user enumeration via IAM API endpoints

Summary The IAM API endpoints listUsers, getUser, listGroups, and getGroup in yamcs-core do not enforce the required SystemPrivilege.ControlAccess check. As a result, any authenticated user even those with low or no privileges can enumerate all user accounts in the system, including their...

PT-2026-43457

Summary A Server-Side Code Injection vulnerability exists in the Yamcs algorithm evaluation engine org.yamcs.algorithms.JavaExprAlgorithmExecutionFactory. The application dynamically compiles and evaluates user-controlled algorithm text without enforcing a secure sandbox. An authenticated user wi...

PT-2026-44162

Summary A Server-Side Code Injection vulnerability exists in the Yamcs script evaluation engine for Python algorithms. The application dynamically compiles and evaluates user-controlled algorithm text using Jython via the JSR-223 ScriptEngine API without enforcing a secure sandbox. An authenticat...

PT-2026-43456

Name of the Vulnerable Software and Affected Versions YAMCS affected versions not specified Description The authentication endpoint "POST /auth/token" in yamcs-core lacks rate limiting, account lockout, and failed attempt throttling. This allows an unauthenticated remote attacker to perform...

PT-2026-43455

Summary The IAM API endpoints listUsers, getUser, listGroups, and getGroup in yamcs-core do not enforce the required SystemPrivilege.ControlAccess check. As a result, any authenticated user even those with low or no privileges can enumerate all user accounts in the system, including their...

LDAP Injection

Overview Affected versions of this package are vulnerable to LDAP Injection via the LdapAuthModule process. An attacker can gain unauthorized access to user accounts by injecting specially crafted input into the username parameter during LDAP authentication. Note: This is only exploitable if the...

CVE-2026-42568

creationtimestamp| type| source ---|---|--- 2026-05-21 15:03:27+00:00| published-proof-of-concept| https://github.com/yamcs/yamcs/security/advisories/GHSA-cqh3-jg8p-336j 2026-05-29 15:00:15+00:00| seen| Telegram/a86W4JR7O--z7UEFDSjPGooPu8cJg6Qw5misZZ2a8xOkaUM 2026-05-29 21:00:04+00:00| seen|...