CVE-2026-106448
StableLib is a stable library of useful TypeScript and JavaScript code.
Impact
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.
Affected products
| Product | Affected versions |
|---|---|
| Useful TypeScript And JavaScript Code. | before 2.0.4 |
Versions were read from the advisory text. No structured product data has been published for this record yet.