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CVE-2026-113724

4.5 · MEDIUM

virtualenv is a tool for creating isolated virtual python environments.

Published Oct 20, 2026CWE-59EPSS 0.20%

Overview

CVE-2026-113724 is a medium-severity vulnerability. It was published on October 20, 2026 and has a CVSS 3.1 base score of 4.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 4.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the safe_delete() deletion error handler responds to a failed removal by reading mode bits with os.lstat(path) and applying owner-write permission with os.chmod(path, ...), which follows a symlink. A planted link inside a read-only directory can therefore cause a victim-owned target outside the destination that is initially not writable by the invoking user to become broadly writable before the retry fails, provided that user owns the target and can change its mode. Another account can use the widened mode only if it can traverse the target's parent directories; root does not reach the demonstrated failure path, and the operation does not itself read the target. This issue is fixed in version 21.14.9.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/pypa/virtualenv/commit/2bfdc0230d1b2685fedfcfe66c835b9a2ec7c440GitHubgithub.com/pypa/virtualenv/pull/3427GitHubgithub.com/pypa/virtualenv/releases/tag/21.14.9GitHubgithub.com/pypa/virtualenv/security/advisories/GHSA-43mp-35q3-x3fqGitHubgithub.com/pypa/virtualenv/security/advisories/GHSA-43mp-35q3-x3fq

How CyberStrike helps

Frequently asked questions

What is CVE-2026-113724?

CVE-2026-113724 is a medium-severity vulnerability. It was published on October 20, 2026 and has a CVSS 3.1 base score of 4.5 (MEDIUM).

How severe is CVE-2026-113724?

This vulnerability has a CVSS 3.1 base score of 4.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-113724?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-113724?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-113724 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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