{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-48819", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-05-22T20:57:10.976Z", "datePublished": "2026-07-17T19:46:00.402Z", "dateUpdated": "2026-07-20T16:24:20.624Z"}, "containers": {"cna": {"title": "Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key", "problemTypes": [{"descriptions": [{"cweId": "CWE-1321", "lang": "en", "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw"}, {"name": "https://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214f", "tags": ["x_refsource_MISC"], "url": "https://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214f"}, {"name": "https://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169", "tags": ["x_refsource_MISC"], "url": "https://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169"}, {"name": "https://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3", "tags": ["x_refsource_MISC"], "url": "https://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3"}], "affected": [{"vendor": "hey-api", "product": "openapi-ts", "versions": [{"version": "< 0.97.3", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-17T19:46:00.402Z"}, "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."}], "source": {"advisory": "GHSA-hhx9-57xq-r5rw", "discovery": "UNKNOWN"}}, "adp": [{"references": [{"url": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-07-20T16:23:29.690460Z", "id": "CVE-2026-48819", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-20T16:24:20.624Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-48819", "role": "CISA Coordinator", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-20T16:23:29.690460Z"}}}], "references": [{"url": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw", "tags": ["exploit"]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-07-20T16:23:41.237Z"}}], "cna": {"title": "Hey API: `buildClientParams` template: prototype chain substitution via unknown `$<slot>___proto__` key", "source": {"advisory": "GHSA-hhx9-57xq-r5rw", "discovery": "UNKNOWN"}, "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 4.8, "attackVector": "NETWORK", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "LOW"}}], "affected": [{"vendor": "hey-api", "product": "openapi-ts", "versions": [{"status": "affected", "version": "< 0.97.3"}]}], "references": [{"url": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw", "name": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw", "tags": ["x_refsource_CONFIRM"]}, {"url": "https://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214f", "name": "https://github.com/hey-api/hey-api/commit/023909137a15eff9c0263d3bcd116140076b214f", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169", "name": "https://github.com/hey-api/hey-api/commit/da321a1529eb3c90d2109da870f514b915a60169", "tags": ["x_refsource_MISC"]}, {"url": "https://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3", "name": "https://github.com/hey-api/hey-api/releases/tag/%40hey-api%2Fopenapi-ts%400.97.3", "tags": ["x_refsource_MISC"]}], "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."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-1321", "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-07-17T19:46:00.402Z"}}}, "cveMetadata": {"cveId": "CVE-2026-48819", "state": "PUBLISHED", "dateUpdated": "2026-07-20T16:24:20.624Z", "dateReserved": "2026-05-22T20:57:10.976Z", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "datePublished": "2026-07-17T19:46:00.402Z", "assignerShortName": "GitHub_M"}, "dataVersion": "5.2"}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.97.3)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "openapi-ts", "source": "cna", "vendor": "hey-api"}, "product": "openapi-ts", "vendor": "hey-api"}], "created": "2026-07-22T02:00:07.508336+00:00", "updated": "2026-07-25T03:15:03.343155+00:00", "vendors": ["hey-api", "hey-api$PRODUCT$openapi-ts"]}