SB20261109212 - Insecure Temporary File in py3-virtualenv

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Main Vulnerability Database SB20261109212

SB20261109212 - Insecure Temporary File in py3-virtualenv

Published: November 9, 2026

Security Bulletin ID SB20261109212
CSH Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Code execution

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Insecure Temporary File (CVE-ID: CVE-2026-113713)

CWE-ID: CWE-377 - Insecure Temporary File

CVSSv4: 7.1 [CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]


The vulnerability allows an unprivileged local attacker to execute code as an environment owner.

The vulnerability exists due to virtualenv's app-data seeder retaining dangling links after temporary-cache cleanup when VIRTUALENV_SYMLINK_APP_DATA or configured symlink_app_data enables symlink seeding and cache setup falls back to temporary storage. An unprivileged local attacker can reclaim the deleted pathname in a shared temporary directory and plant a replacement package that runs when the owner uses the environment.


Remediation

Install update from vendor's website.

References