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    2 vulnerabilities found for openapi-ts by hey-api

    CVE-2026-48819 (GCVE-0-2026-48819)

    Vulnerability from nvd – Published: 2026-07-17 19:46 – Updated: 2026-07-20 16:24
    VLAI
    Title
    Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key
    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.
    Severity
    4.8 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    hey-api openapi-ts Affected: < 0.97.3
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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    CVE-2026-48819 (GCVE-0-2026-48819)

    Vulnerability from cvelistv5 – Published: 2026-07-17 19:46 – Updated: 2026-07-20 16:24
    VLAI
    Title
    Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key
    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.
    Severity
    4.8 (Medium)
    CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
    SSVC
    Exploitation: poc Automatable: no Technical Impact: partial
    CISA Coordinator (v2.0.3)
    CWE
    • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
    Assigner
    References
    Impacted products
    Vendor Product Version
    hey-api openapi-ts Affected: < 0.97.3
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

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