HighVulnerability

CVE-2026-45033: GitHub Copilot CLI code execution via nested malicious bare git repository

Source: NVD(opens in a new tab)
Identifier: CVE-2026-45033
Published: May 13, 2026
Record updated: October 9, 2026

Affected: @github/copilot <= 1.0.42
Fixed in: 1.0.43
Known exploitation: Not listed in the CISA Known Exploited Vulnerabilities catalog at the last check.
EPSS: 0.4%

Summary

A flaw in GitHub Copilot CLI before 1.0.43 allows arbitrary code execution when the agent runs git operations inside a project containing a malicious nested bare git repository. Git's automatic bare repository discovery during directory traversal lets an attacker set core.fsmonitor or other executable config keys, such as core.hookspath, diff.external and merge.tool, which git runs during status, diff or rev-parse without user awareness or approval.

Mitigation

Fixed in 1.0.43.

Details

Scores and exploitation

Patch available: Yes
EPSS: 0.4%Estimated probability that this CVE is exploited in the next 30 days, from the FIRST Exploit Prediction Scoring System. Read on October 15, 2026.
Disclosure date: May 13, 2026

Weaknesses and techniques

Weakness (CWE): CWE-696

Affected

Packages: @github/copilot@<= 1.0.42 (fixed: 1.0.43)
Vendors: Microsoft

Classification

Attack type: Other
Attack sophistication: Moderate
AI component targeted: Plugin
Impact: Confidentiality,
Integrity
Labels: security

How this record was produced

Summaries, mitigations and labels on this page are generated automatically from the source. The linked source is authoritative. The source gives this advisory a description and no title, so the title above is a headline generated from the source text.

Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-45033

First tracked: May 13, 2026 at 08:10 PM ET, from NVD/CVE Database

Classifier: claude-haiku-5-5, prompt v4

Classifier confidence: 85% (self-assessed)

Topics

Coding assistants

Summary

Mitigation

Topics

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