{"id":"CVE-2026-106448","revision":"5a482b8e94ff4a8bad4fd7b7ffe24b68","records":[{"revision":"5a482b8e94ff4a8bad4fd7b7ffe24b68","observedAt":"2026-10-25T04:17:41.466+00:00","statement":{"source":"nvd","id":"CVE-2026-106448","aliases":[],"title":"StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor CBOR map decoding path creates ordinary JavaScript objects and assigns attacker-controlled keys with bracket assignment. A map key n…","description":"StableLib is a stable library of useful TypeScript and JavaScript code. Prior to 2.0.4, the @stablelib/cbor CBOR map decoding path creates ordinary JavaScript objects and assigns attacker-controlled keys with bracket assignment. A map key named __proto__ invokes the inherited prototype setter instead of creating an ordinary own property, allowing the decoded object's prototype to contain attacker-controlled authorization or feature-flag values. Downstream code that trusts normal property lookup or merges the decoded object can therefore make security-sensitive decisions using inherited attacker data. This issue is fixed in version 2.0.4.","state":0,"publishedAt":"2026-10-06T20:17:26.743+00:00","modifiedAt":"2026-10-07T17:16:47.727+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":8.9,"severity":"HIGH"}],"references":["https://github.com/StableLib/stablelib/commit/0f153a63b7552a0e8721f640984113e419015026","https://github.com/StableLib/stablelib/releases/tag/@stablelib/cbor@2.0.4","https://github.com/StableLib/stablelib/security/advisories/GHSA-w48f-fwg7-ww6p"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-106448","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-1321"],"productCriteria":[],"sourceDates":{"published":"2026-10-06T20:17:26.743","lastModified":"2026-10-07T17:16:47.727"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-106448","identifiers":["CVE-2026-106448"]},"retained":false,"historicalAffected":[]}],"coverage":[]}