| Package | Affected versions | Patched versions |
|---|---|---|
| webargs | < 5.1.3 | 5.1.3 |
| webargs | < 5.1.3 | 5.1.3 |
An issue was discovered in webargs before 5.1.3, as used with marshmallow and other products. JSON parsing uses a short-lived cache to store the parsed JSON body. This cache is not thread-safe, meaning that incorrect JSON payloads could have been parsed for concurrent requests.
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