CVE-2021-3426 - CVE House

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Status published Unknown CVE-2021-3426

There's a flaw in Python 3's pydoc. A local or...

0 CVSS

Vulnerability Description

There's a flaw in Python 3's pydoc. A local or adjacent attacker who discovers or is able to convince another local or adjacent user to start a pydoc server could access the server and use it to disclose sensitive information belonging to the other user that they would not normally be able to access. The highest risk of this flaw is to data confidentiality. This flaw affects Python versions before 3.8.9, Python versions before 3.9.3 and Python versions before 3.10.0a7.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

No credits recorded in the NVD database.

References

More from n/a

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Affected Vendor

n/a

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Affected Software

python

Vulnerable Versions:

python 3.8.9, python 3.9.3, python 3.10.0a7

Timeline

Official Publish: May 20th, 2021

Last Modified: December 18th, 2025

Added to House: July 21st, 2026

CVSS Vectors

No vector data available

Weaknesses (CWE)

MITRE ATT&CK TTPs

T1213 Data from Information Repositories

T1005 Data from Local System

T1552 Unsecured Credentials

Credential Access

T1041 Exfiltration Over C2 Channel