CVE-2026-55548 Details
Description
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.
A vulnerability in the Yamcs PacketsApi.exportPackets endpoint prior to versions 5.12.8 and 5.13.2 allows authenticated users with low or no privileges to bypass access controls and export the entire raw telemetry packet archive. The issue arises because the endpoint fails to enforce object-level ReadPacket privileges when requests do not specify packet names, enabling unauthorized access to sensitive mission telemetry data.
Users can update to Yamcs versions 5.12.8 or 5.13.2, both of which include the necessary privilege checks in the exportPackets endpoint.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jul 16, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf | CISA-ADP | ExploitMitigationVendor Advisory |
| https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438 | [email protected] | Patch |
| https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9 | [email protected] | Patch |
| https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8 | [email protected] | Release Notes |
| https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2 | [email protected] | Release Notes |
| https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf | [email protected] | ExploitMitigationVendor Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-284 | Improper Access Control | [email protected] |
| CWE-862 | Missing Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| spaceapplications yamcs | < 5.12.8 >= 5.13.0, < 5.13.2 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 20, 2026 | Initial Analysis | [email protected] |
| Jul 16, 2026 | CVE Modified | CISA-ADP |
| Jul 16, 2026 | New CVE Received | [email protected] |