{"cve":"CVE-2019-9710","nvd":{"published":"2019-03-12T02:29:00.273","modified":"2026-06-17T02:44:12.973","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","score":8.1},"cwes":["CWE-362"],"references":["https://github.com/marshmallow-code/webargs/issues/371","https://webargs.readthedocs.io/en/latest/changelog.html","https://github.com/marshmallow-code/webargs/issues/371","https://webargs.readthedocs.io/en/latest/changelog.html"],"products":["webargs_project:webargs"],"source":"nvd","synced_at":"2026-10-19T20:55:22.313337056+00:00"},"epss":{"cve":"CVE-2019-9710","score":0.01124,"percentile":0.66274,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-8554-jxcw-454q","url":"https://osv.dev/vulnerability/GHSA-8554-jxcw-454q","summary":"Webargs mishandles concurrent JSON parsing","modified":"2025-08-04T21:12:40.126345Z","packages":[{"ecosystem":"PyPI","name":"webargs","purl":"pkg:pypi/webargs","ranges":["<5.1.3"],"fixed":["5.1.3"]}]},{"id":"PYSEC-2019-139","url":"https://osv.dev/vulnerability/PYSEC-2019-139","summary":"","modified":"2023-11-08T04:01:47.527559Z","packages":[{"ecosystem":"PyPI","name":"webargs","purl":"pkg:pypi/webargs","ranges":["<5.1.3"],"fixed":["5.1.3"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}