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CVE-2026-55548

4.3 · MEDIUM

Yamcs is a mission control framework.

Published Jul 16, 2026CWE-284EPSS 0.36%

Overview

CVE-2026-55548 is a medium-severity vulnerability. It was published on July 16, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438GitHubgithub.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9GitHubgithub.com/yamcs/yamcs/releases/tag/yamcs-5.12.8GitHubgithub.com/yamcs/yamcs/releases/tag/yamcs-5.13.2GitHubgithub.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgfGitHubgithub.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf

How CyberStrike helps

Frequently asked questions

What is CVE-2026-55548?

CVE-2026-55548 is a medium-severity vulnerability. It was published on July 16, 2026 and has a CVSS 3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-55548?

This vulnerability has a CVSS 3.1 base score of 4.3, rated MEDIUM. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-55548?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-55548?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-55548 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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