---
cve: "CVE-2026-55548"
severity: "MEDIUM"
cvss: 4.3
epss: "25%"
vendor: "yamcs"
kev: false
exploited: false
published: "2026-07-16 17:16:57"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-02T16:48:50+02:00"
---

# CVE-2026-55548

> 4.3 MEDIUM · 🧪 PoC

## Beschreibung

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-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Unverändert | good |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Keine | good |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 144335f15d7730d7fc833122c8c8a6f1906fea9f (Commit)
- 50d73a44d136f0dd2828fa11f69f1fe1fc5583f7 (Commit)

## Referenzen

- <https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf>
- <https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438>
- <https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9>
- <https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8>
- <https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-55548) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_