CVE-2026-25931Public exploit

Code execution via workspace-trust bypass

Published Feb 9, 2026 · Updated Feb 9, 2026

Code execution in Street Side Software Code Spell Checker before 4.5.4 allows attackers to run Node.js code through a malicious workspace. DocumentSettings._determineIsTrusted accepts the workspace-controlled cSpell.trustedWorkspace value without consulting VS Code's workspace-trust state, then enables ConfigLoader to load executable JavaScript or TypeScript configuration. Exploitation requires a user to open an attacker-prepared workspace, after which the extension host runs the configuration with that user's privileges.

CVSS severity7.8
High
EPSS probability0.13%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code execution in Street Side Software Code Spell Checker before 4.5.4 allows attackers to run Node.js code through a malicious workspace. DocumentSettings._determineIsTrusted accepts the workspace-controlled cSpell.trustedWorkspace value without consulting VS Code's workspace-trust state, then enables ConfigLoader to load executable JavaScript or TypeScript configuration. Exploitation requires a user to open an attacker-prepared workspace, after which the extension host runs the configuration with that user's privileges.

The record

CVE
CVE-2026-25931
Published
Feb 9, 2026
Updated
Feb 9, 2026
Vendor
Street Side Software
Product
Code Spell Checker
Classifications
CWE-807, CWE-829, CWE-276, T1204.002, T1059.007
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 9, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 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=< 4.5.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Street Side Software · Code Spell Checkerversion=< 4.5.4

Published CVSS scores

7.8GitHubCVSS:3.1/AV:L/AC:L/PR:N/UI:R/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 exploitPublished

Weakness, pattern, technique

CWE-807Reliance on Untrusted Inputs in a Security Decision
CWE-829Inclusion of Functionality from Untrusted Control Sphere
CWE-276Incorrect Default Permissions
T1204.002User Execution: Malicious File
T1059.007Command and Scripting Interpreter: JavaScript/JScript

Public exploit references

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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