---
cve: "CVE-2026-18998"
severity: "MEDIUM"
cvss: 5.3
epss: "0.2%"
vendor: "cosmicstack-labs"
kev: false
exploited: false
published: "2026-08-06 06:16:32"
tags: [cve, security, medium]
source: tsecurity.de CVE-Dossier
exported: "2026-09-23T05:51:01+02:00"
---

# CVE-2026-18998

> 5.3 MEDIUM · 🧪 PoC

## Beschreibung

A vulnerability was determined in cosmicstack-labs mercury-agent up to 1.1.12. Impacted is the function SubAgent.run of the file src/core/sub-agent.ts of the component delegate_task Tool. Executing a manipulation can lead to improper authorization. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. The project was informed of the problem early through an issue report but has not responded yet.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |

## Referenzen

- <https://vuldb.com/vuln/386381>
- <https://vuldb.com/vuln/386381/cti>
- <https://vuldb.com/cve/CVE-2026-18998>
- <https://vuldb.com/submit/862628>
- <https://vuldb.com/submit/862629>
- <https://github.com/cosmicstack-labs/mercury-agent/issues/74>
- <https://github.com/cosmicstack-labs/mercury-agent/>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-18998) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_