CVE-2026-5758

Full vulnerability record from the local CVENow database.

Description

JavaScript is vulnerable to prototype pollution in Mafintosh's protocol-buffers-schema Version 3.6.0, where an attacker may alter the application logic, bypass security checks, cause a DoS or achieve remote code execution.

Severity

MEDIUM

CVSS score

6.5 (v3.1)

Vulnerability status

Awaiting Analysis

Source identifier

[email protected]

Published

2026-04-15 18:17:24.920000

Last modified

2026-10-26 21:10:00.170000

View original CVE JSON

{
  "id": "CVE-2026-5758",
  "sourceIdentifier": "[email protected]",
  "published": "2026-04-15T18:17:24.920",
  "lastModified": "2026-10-26T21:10:00.170",
  "vulnStatus": "Awaiting Analysis",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "JavaScript is vulnerable to prototype pollution in Mafintosh's protocol-buffers-schema Version 3.6.0, where an attacker may alter the application logic, bypass security checks, cause a DoS or achieve remote code execution."
    },
    {
      "lang": "es",
      "value": "JavaScript es vulnerable a la contaminación de prototipos en protocol-buffers-schema de Mafintosh Versión 3.6.0, donde un atacante puede alterar la lógica de la aplicación, eludir las comprobaciones de seguridad, causar un DoS o lograr la ejecución remota de código."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Mafintosh",
          "product": "Protocol-buffers-schema parser",
          "versions": [
            {
              "version": "3.6.0",
              "lessThan": "3.6.1",
              "versionType": "custom",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L",
          "baseScore": 6.5,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "LOW",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 2.5
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-04-15T18:55:12.559324Z",
          "id": "CVE-2026-5758",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "references": [
    {
      "url": "https://github.com/mafintosh/protocol-buffers-schema/pull/70",
      "source": "[email protected]"
    },
    {
      "url": "https://morielharush.github.io/2026/04/12/cve-2026-5758-protocol-buffers-schema-prototype-pollution/",
      "source": "[email protected]"
    }
  ]
}