CVE-2026-33247

Estado: ModificadaMedia (5.3)—

NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, if a nats-server is run with static credentials for all clients provided via argv (the command-line), then those credentials are visible to any user who can see the monitoring port, if that too is enabled. The `/debug/vars` end-point contains an unredacted copy of argv. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, configure credentials inside a configuration file instead of via argv, and do not enable the monitoring port if using secrets in argv. Best practice remains to not expose the monitoring port to the Internet, or to untrusted network sources.

CVSS

Versión: 3.1
Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:N/A:N
Puntuación base: 5.3

Probabilidad de explotación (EPSS)

Probabilidad de explotación en los próximos 30 días: 0.54%
Percentil entre todas las CVEs puntuadas: 43
Fecha de la puntuación: 6/10/2026

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).

Tecnologías afectadas (1)

Linuxfoundation — Nats-server

CWE

CWE-215
CWE-214

Referencias

JSON original (NVD)

Mostrar

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  "published": "2026-03-25T20:16:33.223",
  "references": [
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      "url": "https://advisories.nats.io/CVE/secnote-2026-14.txt",
      "tags": [
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        "Vendor Advisory"
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      "value": "NATS-Server is a High-Performance server for NATS.io, a cloud and edge native messaging system. Prior to versions 2.11.15 and 2.12.6, if a nats-server is run with static credentials for all clients provided via argv (the command-line), then those credentials are visible to any user who can see the monitoring port, if that too is enabled. The `/debug/vars` end-point contains an unredacted copy of argv. Versions 2.11.15 and 2.12.6 contain a fix. As a workaround, configure credentials inside a configuration file instead of via argv, and do not enable the monitoring port if using secrets in argv. Best practice remains to not expose the monitoring port to the Internet, or to untrusted network sources."
    },
    {
      "lang": "es",
      "value": "NATS-Server es un servidor de alto rendimiento para NATS.io, un sistema de mensajería nativo de la nube y del edge. Antes de las versiones 2.11.15 y 2.12.6, si se ejecuta un nats-server con credenciales estáticas para todos los clientes proporcionadas a través de argv (la línea de comandos), entonces esas credenciales son visibles para cualquier usuario que pueda ver el puerto de monitoreo, si este también está habilitado. El endpoint `/debug/vars` contiene una copia sin censurar de argv. Las versiones 2.11.15 y 2.12.6 contienen una corrección. Como solución alternativa, configure las credenciales dentro de un archivo de configuración en lugar de a través de argv, y no habilite el puerto de monitoreo si utiliza secretos en argv. La mejor práctica sigue siendo no exponer el puerto de monitoreo a Internet, o a fuentes de red no confiables."
    }
  ],
  "lastModified": "2026-09-09T13:19:24.700",
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