CVE-2019-1010083

7.5 highEPSS 1.8%

The Pallets Project Flask before 1.0 is affected by: unexpected memory usage. The impact is: denial of service. The attack vector is: crafted encoded JSON data. The fixed version is: 1. NOTE: this may overlap CVE-2018-1000656.

Severity

CVSS 3.0

7.5 high

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 1.8% chance of exploitation in the next 30 days; higher than 78% of CVEs (scores of 2026-10-31)
Published: 2019-07-17
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

palletsprojects:flask

Packages (OSV)

Advisory	Ecosystem	Package	Affected	Fixed in
GHSA-5wv5-4vpf-pj6m	PyPI	flask	<1.0	1.0
PYSEC-2019-179	PyPI	flask	<1.0	1.0

References

https://www.palletsprojects.com/blog/flask-1-0-released/
https://www.palletsprojects.com/blog/flask-1-0-released/

Check your stack JSON