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CVE-2026-54981: Visual Studio Code Python Extension Security Feature Bypass Vulnerability

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-11 · updated 2026-10-30
• Weakness: CWE-829

Description

Inclusion of functionality from untrusted control sphere in Visual Studio Code - Python extension allows an unauthorized attacker to bypass a security feature locally.

Affected products

• Microsoft Python extension for Visual Studio Code: all versions
• Microsoft Python extension for Visual Studio Code: from 2020 before 2026.3.1 — fixed in 2026.3.1

How to fix

Upgrade to a fixed version: Microsoft Python extension for Visual Studio Code 2026.3.1. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-54981

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