CVE-2026-45482

File-write approval bypass via environment-variable paths

Published Jun 9, 2026 · Updated Jun 9, 2026

Path traversal in Microsoft GitHub Copilot Chat for Visual Studio Code before 1.123.2 allows local users to bypass file-write approval. The terminal command auto-approval analyzer treats destinations beginning with Windows %VAR% syntax as workspace-relative before the shell expands them to locations outside the workspace. When terminal command auto-approval is enabled, an attacker-controlled agent command can write to sensitive locations without explicit confirmation.

CVSS severity8.4
High
EPSS probability0.34%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in Microsoft GitHub Copilot Chat for Visual Studio Code before 1.123.2 allows local users to bypass file-write approval. The terminal command auto-approval analyzer treats destinations beginning with Windows %VAR% syntax as workspace-relative before the shell expands them to locations outside the workspace. When terminal command auto-approval is enabled, an attacker-controlled agent command can write to sensitive locations without explicit confirmation.

The record

CVE
CVE-2026-45482
Published
Jun 9, 2026
Updated
Jun 9, 2026
Vendor
Microsoft
Product
GitHub Copilot Chat for Visual Studio Code
Classifications
CWE-22, T1203
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.27.0 <1.123.1

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Microsoft · GitHub Copilot Chat for Visual Studio Codeversion=0.27.0 <1.123.1

Published CVSS scores

8.4Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1203Exploitation for Client Execution

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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