FKIE_CVE-2026-33167

Vulnerability from fkie_nvd - Published: 2026-03-23 23:17 - Updated: 2026-03-24 15:53
Severity ?
1.3 (Low) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U
Summary
Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch.
References
security-advisories@github.comhttps://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0
security-advisories@github.comhttps://github.com/rails/rails/releases/tag/v8.1.2.1
security-advisories@github.comhttps://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Action Pack is a Rubygem for building web applications on the Rails framework. In versions on the 8.1 branch prior to 8.1.2.1, the debug exceptions page does not properly escape exception messages. A carefully crafted exception message could inject arbitrary HTML and JavaScript into the page, leading to XSS. This affects applications with detailed exception pages enabled (`config.consider_all_requests_local = true`), which is the default in development. Version 8.1.2.1 contains a patch."
    },
    {
      "lang": "es",
      "value": "Action Pack es una Rubygem para construir aplicaciones web en el framework de Rails. En versiones de la rama 8.1 anteriores a la 8.1.2.1, la p\u00e1gina de excepciones de depuraci\u00f3n no escapa correctamente los mensajes de excepci\u00f3n. Un mensaje de excepci\u00f3n cuidadosamente elaborado podr\u00eda inyectar HTML y JavaScript arbitrarios en la p\u00e1gina, lo que lleva a XSS. Esto afecta a las aplicaciones con p\u00e1ginas de excepci\u00f3n detalladas habilitadas (`config.consider_all_requests_local = true`), lo cual es el valor predeterminado en desarrollo. La versi\u00f3n 8.1.2.1 contiene un parche."
    }
  ],
  "id": "CVE-2026-33167",
  "lastModified": "2026-03-24T15:53:48.067",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "attackVector": "NETWORK",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 1.3,
          "baseSeverity": "LOW",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "UNREPORTED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "NONE",
          "subConfidentialityImpact": "LOW",
          "subIntegrityImpact": "LOW",
          "userInteraction": "PASSIVE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-03-23T23:17:12.707",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rails/rails/commit/6752711c8c31d79ba50d13af6a6698a3b85415e0"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rails/rails/releases/tag/v8.1.2.1"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/rails/rails/security/advisories/GHSA-pgm4-439c-5jp6"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Awaiting Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-79"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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