{"id":"CVE-2019-9710","aliases":["GHSA-8554-jxcw-454q","PYSEC-2019-139"],"url":"https://o3.security/vulnerability/CVE-2019-9710","summary":"Webargs mishandles concurrent JSON parsing","details":"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.","published":"2019-03-12T02:29:00.273Z","modified":"2026-07-08T16:28:20.574886Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"PyPI","name":"webargs","fixedVersion":"5.1.3"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://webargs.readthedocs.io/en/latest/changelog.html"},{"type":"REPORT","url":"https://github.com/marshmallow-code/webargs/issues/371"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-08T16:28:20.574886Z"}}