TOON: Prototype pollution when decoding untrusted TOON input
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||
|---|---|---|---|---|---|---|---|---|---|
| toon-format | toon | affected |
|
No data.
No data.
| Vendor | Product | Versions | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Toon-format | Toon |
|
| Source | ID | Title |
|---|---|---|
Github GHSA |
GHSA-p95v-992w-h6c3 | TOON: Prototype pollution when decoding untrusted TOON input |
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.677% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Toon-format
Toon-format toon |
|
| Vendors & Products |
Toon-format
Toon-format toon |
| Type | Values Removed | Values Added |
|---|---|---|
| Description | TOON is a compact, human-readable serialization of JSON data for LLM prompts. Prior to 2.3.1, decoding attacker-controlled TOON with a __proto__, constructor, or prototype key wrote through the object prototype chain instead of creating an own property, polluting Object.prototype for the runtime. In packages/toon/src/decode/expand.ts, the expandPaths: 'safe' path and insertPathSafe function made dotted keys such as a.__proto__.x the strongest vector, while plain nested objects, tabular rows, quoted keys, and streaming decode were also affected. The encoder also dropped own __proto__ properties and could invoke an inherited setter during normalization. Services that decode untrusted TOON could experience denial of service or, when a suitable downstream gadget is present, remote code execution. This issue is fixed in version 2.3.1. | |
| Title | TOON: Prototype pollution when decoding untrusted TOON input | |
| Weaknesses | CWE-1321 | |
| References |
| |
| Metrics |
cvssV3_1
|