A vulnerability, which was classified as problematic, has been found in dbartholomae lambda-middleware frameguard up to 1.0.4. Affected by this issue is some unknown functionality of the file packages/json-deserializer/src/JsonDeserializer.ts of the component JSON Mime-Type Handler. The manipulation leads to inefficient regular expression complexity.
This vulnerability is handled as CVE-2021-4437. Access to the local network is required for this attack to succeed. There is no exploit available.
It is recommended to upgrade the affected component.
