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CVE-2026-55521GHSA-962X-CCWF-8X6P

Yamcs : Multiple Missing Function Level Access Control vulnerabilities in Yamcs Core API

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.12.8, 5.13.2
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: poc
  • Automatable: no
  • Technical impact: total

Summary

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 packet and event index metadata without ObjectPrivilegeType.ReadPacket, alter COP-1 link state without SystemPrivilege.ControlLinks, and manipulate simulation time. These operations can disclose telemetry metadata, disrupt telecommand handling, and affect system integrity and availability. This issue is fixed in versions 5.12.8 and 5.13.2.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: poc · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • yamcs yamcs

    fixed in 5.12.8; From 5.13.0 · fixed in 5.13.2

  • org.yamcs:yamcs-coreMaven

    From 5.13.0 · fixed in 5.13.2

  • org.yamcs:yamcs-coreMaven

    fixed in 5.12.8

References 5

GitHub · yamcs/yamcs