FKIE_CVE-2026-4837

Vulnerability from fkie_nvd - Published: 2026-04-08 17:21 - Updated: 2026-07-24 20:10
Severity
6.6 (Medium) - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
7.2 (High) - CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
Summary
An eval() injection vulnerability in the Rapid7 Insight Agent beaconing logic for Linux versions could theoretically allow an attacker to achieve remote code execution as root via a crafted beacon response. Because the Agent uses mutual TLS (mTLS) to verify commands from the Rapid7 Platform, it is unlikely that the eval() function could be exploited remotely without prior, highly privileged access to the backend platform.
References
cve@rapid7.comhttps://docs.rapid7.com/insight/release-notes-2026-april/#improvements-and-fixesRelease Notes
Impacted products
Vendor Product Version
rapid7 insight_agent *
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "modules": [
            "ir_agent"
          ],
          "platforms": [
            "Linux"
          ],
          "product": "Insight Agent",
          "vendor": "Rapid7",
          "versions": [
            {
              "changes": [
                {
                  "at": "4.1.0.2",
                  "status": "unaffected"
                }
              ],
              "lessThan": "4.1.0.2",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "source": "cve@rapid7.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:rapid7:insight_agent:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "AB08C3C5-FAC4-4999-A869-E5F3992DA2C5",
              "versionEndExcluding": "4.1.0.2",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "An eval() injection vulnerability in the Rapid7 Insight Agent beaconing logic for Linux versions could theoretically allow an attacker to achieve remote code execution as root via a crafted beacon response. Because the Agent uses mutual TLS (mTLS) to verify commands from the Rapid7 Platform, it is unlikely that the eval() function could be exploited remotely without prior, highly privileged access to the backend platform."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de inyecci\u00f3n eval() en la l\u00f3gica de balizamiento del Agente Rapid7 Insight para versiones de Linux podr\u00eda te\u00f3ricamente permitir a un atacante lograr ejecuci\u00f3n remota de c\u00f3digo como root a trav\u00e9s de una respuesta de baliza manipulada. Debido a que el Agente utiliza TLS mutuo (mTLS) para verificar comandos de la Plataforma Rapid7, es poco probable que la funci\u00f3n eval() pudiera ser explotada remotamente sin acceso previo y altamente privilegiado a la plataforma de backend."
    }
  ],
  "id": "CVE-2026-4837",
  "lastModified": "2026-07-24T20:10:00.147",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 6.6,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 0.7,
        "impactScore": 5.9,
        "source": "cve@rapid7.com",
        "type": "Secondary"
      },
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.2,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "HIGH",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 1.2,
        "impactScore": 5.9,
        "source": "nvd@nist.gov",
        "type": "Primary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-4837",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-09T03:56:13.769975Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-08T17:21:24.603",
  "references": [
    {
      "source": "cve@rapid7.com",
      "tags": [
        "Release Notes"
      ],
      "url": "https://docs.rapid7.com/insight/release-notes-2026-april/#improvements-and-fixes"
    }
  ],
  "sourceIdentifier": "cve@rapid7.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-95"
        }
      ],
      "source": "cve@rapid7.com",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.