How severe is CVE-2022-40897?

CVE-2022-40897 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.

Is CVE-2022-40897 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2022-40897?

CVE-2022-40897 affects Python Setuptools. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2022-40897?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2022-40897 published?

CVE-2022-40897 was published on 2022-12-23 and last updated on 2026-06-17.

CVE-2022-40897

CVE-2022-40897 is a medium-severity vulnerability in Python Setuptools with a CVSS 3.x base score of 5.9. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-1333.

Key facts

Severity: Medium (CVSS 3.x base score 5.9)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-1333
Affected product: Python Setuptools
Published: 2022-12-23
Last modified: 2026-06-17

Description

Python Packaging Authority (PyPA) setuptools before 65.5.1 allows remote attackers to cause a denial of service via HTML in a crafted package or custom PackageIndex page. There is a Regular Expression Denial of Service (ReDoS) in package_index.py.

Frequently asked questions

What is CVE-2022-40897?: Python Packaging Authority (PyPA) setuptools before 65.5.1 allows remote attackers to cause a denial of service via HTML in a crafted package or custom PackageIndex page. There is a Regular Expression Denial of Service (ReDoS) in package_index.py.
How severe is CVE-2022-40897?: CVE-2022-40897 has a CVSS 3.x base score of 5.9, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2022-40897 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2022-40897?: CVE-2022-40897 affects Python Setuptools. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2022-40897?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2022-40897 published?: CVE-2022-40897 was published on 2022-12-23 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:python:setuptools:*:*:*:*:*:*:*:*

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