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...

YAMCS yamcs-core 5.12.7 - No Rate Limiting

Exploit Title: YAMCS yamcs-core 5.12.7 - No Rate Limiting Date: 2026-05-27 Exploit Author: Daniel Miranda Barcelona Excal1bur Vendor Homepage: https://yamcs.org Software Link: https://github.com/yamcs/yamcs Version: 5.12.7 Tested on: Linux CVE: CVE-2026-44596 Category: Remote / Brute Force...

YAMCS yamcs-core 5.12.7 - User Enumeration

Exploit Title: YAMCS yamcs-core 1 else "http://localhost:8090" username = sys.argv2 if lensys.argv 2 else "testuser" password = sys.argv3 if lensys.argv 3 else "test" base = target.rstrip"/" print"=" 65 print" CVE-2026-44595 — YAMCS IAM User Enumeration PoC" printf" Target: target" printf"...

Exploit for CVE-2026-42568

CVE-2026-42568 — YAMCS LDAP Injection in LdapAuthModule Su...

Exploit for CVE-2026-44595

CVE-2026-44595 — YAMCS Unauthorized User Enumeration via IAM A...

Exploit for CVE-2026-44596

CVE-2026-44596 — YAMCS No Rate Limiting on Authentication Endp...

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...

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...

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...

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...

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-2026-43455

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...

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...

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...