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    <link>https://cve.radiocsirt.org</link>
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    <lastBuildDate>Wed, 14 Oct 2026 18:32:51 +0000</lastBuildDate>
    <item>
      <title>CVE-2026-48819 — Hey API: `buildClientParams` template: prototype chain substitution via unknown `$&lt;slot&gt;___proto__` key</title>
      <link>https://cve.radiocsirt.org/vuln/cve-2026-48819</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; hey-api openapi-ts&lt;/p&gt;
&lt;p&gt;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[&amp;#34;query&amp;#34;][&amp;#34;__proto__&amp;#34;] = 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.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; hey-api openapi-ts&lt;/p&gt;
&lt;p&gt;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[&amp;#34;query&amp;#34;][&amp;#34;__proto__&amp;#34;] = 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.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://cve.radiocsirt.org/vuln/cve-2026-48819</guid>
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