CVE-2026-44595

Yamcs: Unauthorized user enumeration via IAM API endpoints

CVSS 4.3 MEDIUMCWE-862

Vexday Risk Score

30Bajo

Decisión SSVC (CISA)

Attend

PoC disponible → seguir de cerca

Madurez del exploit

Prueba de concepto

Existe prueba de concepto pública, pero aún no automatizada.

CVSS 4.3EPSS —KEV nãoPoC públicaNuclei —Metasploit —Patch —

Ciclo de vida

29 may 2026PoC pública

16 jul 2026Publicada en NVD

Recomendación: Planificar corrección próxima — ya existe PoC pública.

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 with low or no privileges, could enumerate all user accounts in the system including their usernames, superuser status, and group memberships. This issue is fixed in versions 5.12.7 and 5.13.0.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Productos afectados

yamcs · yamcs

PoCs públicas encontradas — 2

githubgithub.com/ex-cal1bur/CVE-2026-44595★ 0 exploitdbwww.exploit-db.com/exploits/52604no verificado

⚠ Recursos públicos, para evaluar la exposición de sistemas que controlas o estás autorizado a probar. Prueba solo con autorización.

Referencias

https://github.com/yamcs/yamcs/commit/0e12b518f103f24681299318a30a460fe4327b88 https://github.com/yamcs/yamcs/commit/e90099fba98e96214217c195b6a5b87b5f46e51c https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 https://github.com/yamcs/yamcs/security/advisories/GHSA-p2rj-mrmc-9w29