FKIE_CVE-2026-48819

Vulnerability from fkie_nvd - Published: 2026-07-17 20:17 - Updated: 2026-07-23 18:02
Severity
4.8 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Summary
Hey API is an ecosystem for turning API specifications into production-ready code. Prior to 0.97.3, dist/clients/core/params.ts ships a runtime template copied into generated SDKs as params.gen.ts, and buildClientParams writes unknown slot-prefixed keys such as $body_, $headers_, $path_, and $query_ directly to the corresponding slot, allowing $query___proto__ alongside a legitimate q field to set params.query through params["query"]["__proto__"] = value, call Object.setPrototypeOf(params.query, value), and expose inherited attacker-controlled keys during for..in iteration. This issue is fixed in version 0.97.3.
References
security-advisories@github.comhttps://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214f
security-advisories@github.comhttps://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169
security-advisories@github.comhttps://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3
security-advisories@github.comhttps://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "openapi-ts",
          "vendor": "hey-api",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.97.3"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Hey API is an ecosystem for turning API specifications into production-ready code. Prior to 0.97.3, dist/clients/core/params.ts ships a runtime template copied into generated SDKs as params.gen.ts, and buildClientParams writes unknown slot-prefixed keys such as $body_, $headers_, $path_, and $query_ directly to the corresponding slot, allowing $query___proto__ alongside a legitimate q field to set params.query through params[\"query\"][\"__proto__\"] = value, call Object.setPrototypeOf(params.query, value), and expose inherited attacker-controlled keys during for..in iteration. This issue is fixed in version 0.97.3."
    }
  ],
  "id": "CVE-2026-48819",
  "lastModified": "2026-07-23T18:02:00.793",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 4.8,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "LOW",
          "integrityImpact": "LOW",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 2.5,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-48819",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-07-20T16:23:29.690460Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-07-17T20:17:21.553",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214f"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-1321"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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