CVE-2026-106448
CVE-2026-106448 · StableLib: Prototype poisoning via `__proto__` map keys in CBOR decoding
Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.
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 · Alta · EPSS 0,4% · Corrección disponible
- Publicación
- Actualización
Pila tecnológica: node
Productos y versiones afectados
stablelib
- Versiones
- < 2.0.4: Afectada
Sin corrección publicada
@stablelib/cbor npm
- Intervalos de versiones afectados
- SEMVER: < 2.0.3
Actualiza a 2.0.3