CVE-2026-5271

pymanager included the current working directory in sys.path meaning modules could be shadowed by modules in the current working directory. As a result, if a user executes a pymanager-generated command (e.g., pip, pytest) from an attacker-controlled directory, a malicious module in that directory can be imported and executed instead of the intended package.

CVSS 4.0

5.6CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

7.8CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS

0.2% chance of exploitation in the next 30 days; higher than 6% of CVEs (scores of 2026-10-26)

CWE

CWE-427

Published

2026-04-01

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• python:pymanager

References

• https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6
• http://www.openwall.com/lists/oss-security/2026/04/01/5
• https://github.com/python/pymanager/security/advisories/GHSA-jr5x-hgm4-rrm6

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