---
id: CVE-2026-55548
title: Yamcs is a mission control framework
summary: >-
  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 om…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-284
  - CWE-862
vendor: spaceapplications
product: yamcs
affected:
  - yamcs < 5.12.8
  - 'yamcs >= 5.13.0, < 5.13.2'
patched:
  - yamcs 5.13.2
published: '2026-07-16'
updated: '2026-07-20'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55548'
references:
  - url: >-
      https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438
    label: security-advisories@github.com
  - url: >-
      https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8'
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2'
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf'
    label: security-advisories@github.com
  - url: 'https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.0036
epssPercentile: 0.27263
ingestedAt: '2026-07-20T01:35:22.431Z'
---

## Overview

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

- `yamcs < 5.12.8`
- `yamcs >= 5.13.0, < 5.13.2`

## Remediation

Upgrade past the affected range:

- `yamcs 5.13.2`