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CVE-2022-40897

MEDIUM
5.9
CVSS Score
Published: December 22, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 05:02 AM UTC
1 product affected across 1 vendorSetuptools

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Severity
MEDIUM5.9
Exploit prediction
EPSS 3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Setuptools· Python
95%
v < 65.5.1
Affected range stops below 65.5.1, so it looks safe — our inference, not a vendor statement

References (10)

Third Party Advisory
Source: [email protected]
https://github.com/pypa/setuptools/blob/fe8a98e696241487ba6ac9f91faa38ade939ec5d/setuptools/package_index.py#L200
PatchThird Party Advisory
Source: [email protected]
https://github.com/pypa/setuptools/commit/43a9c9bfa6aa626ec2a22540bea28d2ca77964be
Release NotesThird Party Advisory
Source: [email protected]
https://github.com/pypa/setuptools/compare/v65.5.0...v65.5.1
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ADES3NLOE5QJKBLGNZNI2RGVOSQXA37R/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YNA2BAH2ACBZ4TVJZKFLCR7L23BG5C3H/
ExploitPatchTechnical DescriptionVendor Advisory
Source: [email protected]
https://pyup.io/posts/pyup-discovers-redos-vulnerabilities-in-top-python-packages/
Third Party Advisory
Source: [email protected]
https://pyup.io/vulnerabilities/CVE-2022-40897/52495/
Source: [email protected]
https://security.netapp.com/advisory/ntap-20230214-0001/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.9MEDIUMCISA-ADP
Attack Vector
NETWORK
Complexity
HIGH
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-1333

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