CVE-2026-106448
CVE-2026-106448 · StableLib: Prototype poisoning via `__proto__` map keys in CBOR decoding
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StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor CBOR map decoding path creates ordinary JavaScript objects and assigns attacker-controlled keys with bracket assignment. A map key named __proto__ invokes the inherited prototype setter instead of creating an ordinary own property, allowing the decoded object's prototype to contain attacker-controlled authorization or feature-flag values. Downstream code that trusts normal property lookup or merges the decoded object can therefore make security-sensitive decisions using inherited attacker data. This issue is fixed in version 2.0.4.
CVSS 8.9 · Élevée · EPSS 0,4% · Correctif disponible
- Publication
- Mise à jour
Pile logicielle: node
Produits et versions concernés
stablelib
- Versions du logiciel
- < 2.0.4: Concernée
Aucun correctif publié
@stablelib/cbor npm
- Plages de versions concernées
- SEMVER: < 2.0.3
Mettez à jour vers 2.0.3