CVE-2026-55548: Spaceapplications Yamcs

Medium severity, CVSS 4.3. EPSS: 0.4% chance of exploitation in the next 30 days.

Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, the PacketsApi.exportPackets endpoint in yamcs-core/src/main/java/org/yamcs/http/api/PacketsApi.java failed to enforce object-level ReadPacket privileges when a request omitted specific packet names: with an empty name list the ctx.checkObjectPrivileges(ObjectPrivilegeType.ReadPacket, nameSet) call passed over an empty set, no WHERE pname IN filter was applied to the resulting SELECT * FROM tm query, and the onTuple handler streamed every retrieved packet without any per-row authorization check, so a low-privileged or zero-privilege authenticated user could dump the entire raw telemetry packet archive and bypass the role-based access control model. This issue is fixed in versions 5.12.8 and 5.13.2, which enforce per-packet ReadPacket checks in exportPackets.

Affected products

• Spaceapplications Yamcs: before 5.12.8 (fixed in 5.12.8); from 5.13.0, before 5.13.2 (fixed in 5.13.2)

Published 2026-07-16. Last modified 2026-07-20.