جزئیات آسیب‌پذیری

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.

• https://github.com/toon-format/toon/security/advisories/GHSA-p95v-992w-h6c3 x_refsource_CONFIRM
• https://github.com/toon-format/toon/pull/316 x_refsource_MISC
• https://github.com/toon-format/toon/commit/94a2b7560b2b5ed903a4d466a3bce8b13daa2660 x_refsource_MISC
• https://github.com/toon-format/toon/releases/tag/v2.3.1 x_refsource_MISC