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CVE-2026-32887

Estado: AnalizadaAlta (7.4)—

Effect is a TypeScript framework that consists of several packages that work together to help build TypeScript applications. Prior to version 3.20.0, when using `RpcServer.toWebHandler` (or `HttpApp.toWebHandlerRuntime`) inside a Next.js App Router route handler, any Node.js `AsyncLocalStorage`-dependent API called from within an Effect fiber can read another concurrent request's context — or no context at all. Under production traffic, `auth()` from `@clerk/nextjs/server` returns a different user's session. Version 3.20.0 contains a fix for the issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de lógica de contexto en framework web (AV:N, AC:H) que permite lectura de sesiones de otros usuarios; explotación remota sin privilegios ni interacción. Impacto: acceso a credenciales/sesiones de autenticación de terceros y exposición de datos sensibles en memoria.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Privileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkVulnerability ScanningUser Account ManagementPassword Policies

Tecnologías afectadas (1)

Effectful — Effect

CWE

Referencias

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{
  "id": "CVE-2026-32887",
  "cveTags": [],
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          "role": "CISA Coordinator",
          "options": [
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            },
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              "automatable": "no"
            },
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            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-03-25T13:36:39.114796Z"
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          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
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      }
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  "published": "2026-03-20T22:16:27.980",
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    }
  ],
  "lastModified": "2026-06-17T10:36:30.770",
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