---
cve: "CVE-2026-77415"
severity: "CRITICAL"
cvss: 9.3
epss: "71.7%"
vendor: "jsonata-js"
kev: false
exploited: false
published: "2026-08-21 21:17:07"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-08-31T19:36:15+02:00"
---

# CVE-2026-77415

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

JSONata is a JSON query and transformation language. Prior to 1.8.8 and 2.2.1, crafted JSONata expressions could chain several object-integrity weaknesses to execute arbitrary code. The chain could overwrite $clone to mutate objects through evaluateTransformExpression, expose and deconstruct JSONata functions or lambdas through $merge.*, replace proc.arguments.forEach used by applyProcedure, and forge internal lambda state. These primitives allowed an attacker to reach prototype getters, prototype and constructor access, and process.getBuiltinModule with child_process, executing code with the privileges of the host process. This issue is fixed in versions 1.8.8 and 2.2.1.

## CVSS-Vektor

```
CVSS:4.0/AV:N/AC:L/AT:N/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 | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |

## Patch verfügbar (OSV)

- 18ce8933ae1403c8732a4ef09a6b9f801381164f (Commit)
- 06fc08cacff16315edddec9632e98c8c7342785b (Commit)

## Referenzen

- <https://github.com/jsonata-js/jsonata/security/advisories/GHSA-66mm-25pp-rfff>
- <https://github.com/jsonata-js/jsonata/pull/799>
- <https://github.com/jsonata-js/jsonata/pull/800>
- <https://github.com/jsonata-js/jsonata/pull/802>
- <https://github.com/jsonata-js/jsonata/commit/47c0e58542202c705726663166dbee5fcae47d06>
- <https://github.com/jsonata-js/jsonata/commit/4b217d514376e30cba278941298d7ba97c4a6c6e>
- <https://github.com/jsonata-js/jsonata/commit/59e25144fc3b7125f6befd71b8a6e14e1fa610d2>
- <https://github.com/jsonata-js/jsonata/commit/f09df8416eab8ff44926fc6527c80fb8701de159>
- <https://github.com/jsonata-js/jsonata/commit/f174348c7fa30f271b63ddedf0767e814004bc4d>
- <https://github.com/jsonata-js/jsonata/releases/tag/v1.8.8>
- <https://github.com/jsonata-js/jsonata/releases/tag/v2.2.1>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-77415) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_