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CVE-2025-48075

Status: AnalyzedHigh (7.7)—

Fiber is an Express-inspired web framework written in Go. Starting in version 2.52.6 and prior to version 2.52.7, `fiber.Ctx.BodyParser` can map flat data to nested slices using `key[idx]value` syntax, but when idx is negative, it causes a panic instead of returning an error stating it cannot process the data. Since this data is user-provided, this could lead to denial of service for anyone relying on this `fiber.Ctx.BodyParser` functionality. Version 2.52.7 fixes the issue.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

Vulnerabilidad en aplicación web expuesta (fiber framework) accesible por red sin autenticación (AV:N/PR:N/UI:N). Panic por índice negativo en BodyParser causa negación de servicio (CWE-129 desbordamiento de búfer implícito).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Affected technologies (1)

Gofiber — Fiber

CWEs

References

Raw JSON (NVD)

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{
  "id": "CVE-2025-48075",
  "cveTags": [],
  "metrics": {
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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          "options": [
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          "integrityImpact": "NONE",
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          "valueDensity": "NOT_DEFINED",
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          "modifiedAttackRequirements": "NOT_DEFINED",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED"
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      "url": "https://github.com/gofiber/fiber/commit/e115c08b8f059a4a031b492aa9eef0712411853d",
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      "lang": "en",
      "value": "Fiber is an Express-inspired web framework written in Go. Starting in version 2.52.6 and prior to version 2.52.7, `fiber.Ctx.BodyParser` can map flat data to nested slices using `key[idx]value` syntax, but when idx is negative, it causes a panic instead of returning an error stating it cannot process the data. Since this data is user-provided, this could lead to denial of service for anyone relying on this `fiber.Ctx.BodyParser`  functionality. Version 2.52.7 fixes the issue."
    },
    {
      "lang": "es",
      "value": "Fiber es un framework web inspirado en Express y escrito en Go. A partir de la versión 2.52.6 y anteriores a la 2.52.7, `fiber.Ctx.BodyParser` puede asignar datos planos a segmentos anidados mediante la sintaxis `key[idx]value`. Sin embargo, cuando `idx` es negativo, genera un pánico en lugar de devolver un error que indica que no puede procesar los datos. Dado que estos datos son proporcionados por el usuario, esto podría provocar una denegación de servicio para cualquiera que dependa de esta funcionalidad de `fiber.Ctx.BodyParser`. La versión 2.52.7 soluciona este problema."
    }
  ],
  "lastModified": "2026-06-17T09:29:06.793",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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          "operator": "OR"
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}