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 - 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"...

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...

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...

org.yamcs:distribution (>=5.0.0 <=5.12.6), org.yamcs:packet-viewer (>=5.0.0 <=5.12.6) +9 more potentially affected by CVE-2026-46621 via org.yamcs:yamcs-core (>=5.0.0 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =5.0.0, =5.0.0, =5.0.0, =5.10.0, =5.10.0, =0.1.0, =0.1, =1.0.0, =5.0.0, =5.0.0, =0.1.0, =0.8.0 Source cves: CVE-2026-46621 Source advisory: SNYK:JAVA-ORGYAMCS-17230855...

org.yamcs:distribution (>=4.7.1 <=5.12.6), org.yamcs:packet-viewer (>=4.10.3 <=5.12.6) +14 more potentially affected by CVE-2026-46621 via org.yamcs:yamcs-core (>=0.29.3 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =0.29.3, =4.7.1, =4.10.3, =4.10.3, =5.10.0, =5.10.0, =3.4.0, =4.5.0, =0.1.0, =0.1, =4.5.0, =0.29.3, =1.0.0, =4.7, =4.10.3, =5.12.6 and more Source cves: CVE-2026-46621 Source advisory: OSV:GHSA-2G95-6X5Q-XJWJ...

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...

org.yamcs:distribution (>=5.0.0 <=5.12.6), org.yamcs:packet-viewer (>=5.0.0 <=5.12.6) +9 more potentially affected by CVE-2026-46562 via org.yamcs:yamcs-core (>=5.0.0 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =5.0.0, =5.0.0, =5.0.0, =5.10.0, =5.10.0, =0.1.0, =0.1, =1.0.0, =5.0.0, =5.0.0, =0.1.0, =0.8.0 Source cves: CVE-2026-46562 Source advisory: SNYK:JAVA-ORGYAMCS-17230916...

org.yamcs:distribution (>=4.7.1 <=5.12.6), org.yamcs:packet-viewer (>=4.10.3 <=5.12.6) +14 more potentially affected by CVE-2026-46562 via org.yamcs:yamcs-core (>=0.29.3 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =0.29.3, =4.7.1, =4.10.3, =4.10.3, =5.10.0, =5.10.0, =3.4.0, =4.5.0, =0.1.0, =0.1, =4.5.0, =0.29.3, =1.0.0, =4.7, =4.10.3, =5.12.6 and more Source cves: CVE-2026-46562 Source advisory: OSV:GHSA-VMWP-VH32-RJ75...

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...

org.yamcs:distribution (>=5.0.0 <=5.12.6), org.yamcs:packet-viewer (>=5.0.0 <=5.12.6) +9 more potentially affected by CVE-2026-44632 via org.yamcs:yamcs-core (>=5.0.0 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =5.0.0, =5.0.0, =5.0.0, =5.10.0, =5.10.0, =0.1.0, =0.1, =1.0.0, =5.0.0, =5.0.0, =0.1.0, =0.8.0 Source cves: CVE-2026-44632 Source advisory: SNYK:JAVA-ORGYAMCS-17230148...

org.yamcs:distribution (>=4.7.1 <=5.12.6), org.yamcs:packet-viewer (>=4.10.3 <=5.12.6) +14 more potentially affected by CVE-2026-44632 via org.yamcs:yamcs-core (>=0.29.3 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =0.29.3, =4.7.1, =4.10.3, =4.10.3, =5.10.0, =5.10.0, =3.4.0, =4.5.0, =0.1.0, =0.1, =4.5.0, =0.29.3, =1.0.0, =4.7, =4.10.3, =5.12.6 and more Source cves: CVE-2026-44632 Source advisory: OSV:GHSA-524G-X36V-9WM6...

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...

org.yamcs:distribution (>=5.0.0 <=5.12.6), org.yamcs:packet-viewer (>=5.0.0 <=5.12.6) +9 more potentially affected by CVE-2026-44596 via org.yamcs:yamcs-core (>=5.0.0 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =5.0.0, =5.0.0, =5.0.0, =5.10.0, =5.10.0, =0.1.0, =0.1, =1.0.0, =5.0.0, =5.0.0, =0.1.0, =0.8.0 Source cves: CVE-2026-44596 Source advisory: SNYK:JAVA-ORGYAMCS-17230791...

org.yamcs:distribution (>=4.7.1 <=5.12.6), org.yamcs:packet-viewer (>=4.10.3 <=5.12.6) +14 more potentially affected by CVE-2026-44596 via org.yamcs:yamcs-core (>=0.29.3 <=5.12.6)

org.yamcs:yamcs-core MAVEN version =0.29.3, =4.7.1, =4.10.3, =4.10.3, =5.10.0, =5.10.0, =3.4.0, =4.5.0, =0.1.0, =0.1, =4.5.0, =0.29.3, =1.0.0, =4.7, =4.10.3, =5.12.6 and more Source cves: CVE-2026-44596 Source advisory: OSV: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...

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...