What’s Vulnerable › Vulnerabilities

CVE-2022-40899

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2022-12-23 · updated 2026-06-17
• Weakness: CWE-400

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.

Affected products

• Pythoncharmers Python-Future: through 0.18.2

References

• https://github.com/PythonCharmers/python-future/blob/master/src/future/backports/http/cookiejar.py#L215
• https://github.com/PythonCharmers/python-future/pull/610
• https://github.com/python/cpython/pull/17157
• https://pypi.org/project/future/
• https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/
• https://github.com/PythonCharmers/python-future/blob/master/src/future/backports/http/cookiejar.py#L215
• https://github.com/PythonCharmers/python-future/pull/610
• https://github.com/python/cpython/pull/17157
• https://pypi.org/project/future/
• https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/

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