CVE-2022-40899

Name: CVE-2022-40899
Creator: NVD / NIST
Published: 2022-12-23T00:15:14.11+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10EPSS 1.80%

Last modified Jun 17, 2026

CVE-2022-40899 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. An issue discovered in Python Charmers Future 0.18.2 and earlier allows remote attackers to cause a denial of service via crafted Set-Cookie header from malicious web server.. EPSS estimates a 1.80% chance of exploitation in the next 30 days.

Description

An issue discovered in Python Charmers Future 0.18.2 and earlier allows remote attackers to cause a denial of service via crafted Set-Cookie header from malicious web server.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.80%

75.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-400

Affected Software

Vendor	Product	Versions
Pythoncharmers	Python-Future	<= 0.18.2

References

https://github.com/PythonCharmers/python-future/blob/master/src/future/backports/http/cookiejar.py#L215Third Party Advisory
https://github.com/PythonCharmers/python-future/pull/610Issue Tracking, Patch, Third Party Advisory
https://github.com/python/cpython/pull/17157Exploit, Patch, Third Party Advisory
https://pypi.org/project/future/Product, Third Party Advisory
https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/Exploit, Vendor Advisory
https://github.com/PythonCharmers/python-future/blob/master/src/future/backports/http/cookiejar.py#L215Third Party Advisory
https://github.com/PythonCharmers/python-future/pull/610Issue Tracking, Patch, Third Party Advisory
https://github.com/python/cpython/pull/17157Exploit, Patch, Third Party Advisory
https://pypi.org/project/future/Product, Third Party Advisory
https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/Exploit, Vendor Advisory

Timeline

Published: Dec 23, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-40899?

An issue discovered in Python Charmers Future 0.18.2 and earlier allows remote attackers to cause a denial of service via crafted Set-Cookie header from malicious web server.

How severe is CVE-2022-40899?

CVE-2022-40899 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.80% probability of exploitation in the next 30 days.

How do I fix CVE-2022-40899?

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-2022-40899?

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

Scan your code now

Source: NVD / NIST