CVE-2018-1000656

Name: CVE-2018-1000656
Creator: NVD / NIST
Published: 2018-08-20T19:31:45.34+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 3.85%

Last modified Jun 17, 2026

CVE-2018-1000656 is a vulnerability of currently unknown severity. 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. EPSS estimates a 3.85% chance of exploitation in the next 30 days.

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

EPSS Probability

3.85%

88.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-20

Affected Software

Vendor	Product	Versions
Palletsprojects	Flask	< 0.12.3
Netapp	Active Iq	All versions
Netapp	Hyper Converged Infrastructure	All versions
Netapp	Ontap Select Deploy Utility	All versions

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
Status: Modified

Frequently Asked Questions

What is CVE-2018-1000656?

How severe is CVE-2018-1000656?

Severity scoring for CVE-2018-1000656 is pending analysis. The EPSS model estimates a 3.85% probability of exploitation in the next 30 days.

How do I fix CVE-2018-1000656?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2018-1000656?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST