CVE-2026-55548

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.

• CWE-284
• CWE-862

• https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438Patch
• https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9Patch
• https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8Release Notes
• https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2Release Notes
• https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgfExploit, Mitigation, Vendor Advisory
• https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgfExploit, Mitigation, Vendor Advisory

Published

Jul 16, 2026

Last Modified

Jul 20, 2026

Status

Analyzed

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