Medium 4.3Published Jul 16, 2026

CVE-2026-55548Yamcs: Insecure Direct Object Reference (IDOR) in PacketsApi allows unprivileged users to dump all telemetry packets

Updated under an hour ago (Oct 27, 2026, 9:40 AM ET)

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Exploited in the last 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.

CVSS: 4.3 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Weakness (CWE): CWE-284, CWE-862
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Jul 16, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

yamcs yamcs yamcs:yamcs (from the name)	before 5.12.8; from 5.13.0, < 5.13.2	CNA record
spaceapplications yamcs spaceapplications:yamcs	before 5.12.8; from 5.13.0 before 5.13.2	NVD

References

References

https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf	x-refsource-confirm, exploit, mitigation, vendor-advisory
https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438	x-refsource-misc, patch
https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9	x-refsource-misc, patch
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8	x-refsource-misc, release-notes
https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2	x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.