CVE-2018-1000656

HighCVSS 7.5/10Last modified Jun 17, 2026

Description

The Pallets Project flask version Before 0.12.3 contains a CWE-20: Improper Input Validation vulnerability in flask that can result in Large amount of memory usage possibly leading to denial of service. This attack appear to be exploitable via Attacker provides JSON data in incorrect encoding. This vulnerability appears to have been fixed in 0.12.3. NOTE: this may overlap CVE-2019-1010083.

Metrics

CVSS 3.0 7.5/10CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-20

Affected software

Vendor	Product	Versions
n/a	n/a	n/a

References

https://github.com/pallets/flask/pull/2691Issue Tracking, Patch, Third Party Advisory
https://github.com/pallets/flask/releases/tag/0.12.3Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html
https://security.netapp.com/advisory/ntap-20190221-0001/Patch, Third Party Advisory
https://usn.ubuntu.com/4378-1/
https://github.com/pallets/flask/pull/2691Issue Tracking, Patch, Third Party Advisory
https://github.com/pallets/flask/releases/tag/0.12.3Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/08/msg00025.html
https://security.netapp.com/advisory/ntap-20190221-0001/Patch, Third Party Advisory
https://usn.ubuntu.com/4378-1/

Timeline

Published: Aug 20, 2018
Last modified: Jun 17, 2026
NVD status: Modified

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