CVE-2026-48819

{"id": "CVE-2026-48819", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48819", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-07-20T16:23:29.690460Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"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"}, "impactScore": 2.5, "exploitabilityScore": 2.2}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "hey-api", "product": "openapi-ts", "versions": [{"status": "affected", "version": "< 0.97.3"}]}]}], "published": "2026-07-17T20:17:21.553", "references": [{"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": "security-advisories@github.com"}, {"url": "https://github.com/hey-api/hey-api/security/advisories/GHSA-hhx9-57xq-r5rw", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Received", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-1321"}]}], "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."}], "lastModified": "2026-07-20T17:17:11.153", "sourceIdentifier": "security-advisories@github.com"}