---
cve: "CVE-2026-102992"
severity: "CRITICAL"
cvss: 9.2
epss: ""
vendor: "piscinajs"
kev: false
exploited: false
published: "2026-09-30 20:17:27"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-24T04:27:00+02:00"
---

# CVE-2026-102992

> 9.2 CRITICAL · 🧪 PoC

## Beschreibung

piscina is a node.js worker pool implementation. Prior to 4.9.4, 5.3.2, and 6.0.0-rc.5, Piscina stores ThreadPool.options in src/index.ts as a plain object that inherits from Object.prototype. Applications with a separate prototype-pollution primitive can therefore supply inherited values for security-sensitive options that do not have own defaults. An inherited execArgv value is passed to the Node.js Worker constructor and can preload attacker-controlled code in worker threads, an inherited loadBalancer function can execute during task scheduling, and inherited env values can alter worker environments. This issue is fixed in versions 4.9.4, 5.3.2, and 6.0.0-rc.5.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-09-30 20:47:49
- CNA-CVSS: **9.2** (`CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

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

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

## Schwachstellen-Klasse

- **CWE-1321** — Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
  The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

## Angriffsmuster (CAPEC)

- [CAPEC-1 — Accessing Functionality Not Properly Constrained by ACLs](https://capec.mitre.org/data/definitions/1.html) _(Severity: High)_
- [CAPEC-77 — Manipulating User-Controlled Variables](https://capec.mitre.org/data/definitions/77.html) _(Severity: Very High)_
- [CAPEC-180 — Exploiting Incorrectly Configured Access Control Security Levels](https://capec.mitre.org/data/definitions/180.html) _(Severity: Medium)_

## ATT&CK-Techniken

- [T1574.010 — Hijack Execution Flow: ServicesFile Permissions Weakness](https://attack.mitre.org/techniques/T1574/010/)

## Patch verfügbar (OSV)

- 016f84d4f0cf2f94c16652d491d644d3ce03f275 (Commit)
- 0cb12fca37f526065b072592afe954574dcc656f (Commit)

## Referenzen

- <https://github.com/piscinajs/piscina/security/advisories/GHSA-67c8-pqhq-4rmx>
- <https://github.com/piscinajs/piscina/commit/0cb12fca37f526065b072592afe954574dcc656f>
- <https://github.com/piscinajs/piscina/commit/2f69f67159a0e48b38fd61fa4a91c2fdc19fff72>
- <https://github.com/piscinajs/piscina/commit/5be7bbb19e3787bb698862cd516121a578d690f7>
- <https://github.com/piscinajs/piscina/commit/bebbda255c2981cecddd36b171b94be2fd41c9a6>
- <https://github.com/piscinajs/piscina/releases/tag/v4.9.4>
- <https://github.com/piscinajs/piscina/releases/tag/v5.3.2>
- <https://github.com/piscinajs/piscina/releases/tag/v6.0.0-rc.5>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-102992/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_