CVE-2026-25931

HIGHNVD 7.87.8—
EchelonGraph scoreMEDIUM confidence

This high-severity CVE scores 7.8 under NVD CVSS v3. EPSS exploit probability: 0.0%, top 91% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, nvd
7.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.8Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

vscode-spell-checker is a basic spell checker that works well with code and documents. Prior to v4.5.4, DocumentSettings._determineIsTrusted treats the configuration value cSpell.trustedWorkspace as the authoritative trust flag. The value defaults to true (package.json) and is read from workspace configuration each time settings are fetched. The code coerces any truthy value to true and forwards it to ConfigLoader.setIsTrusted , which in turn allows JavaScript/TypeScript configuration files ( .cspell.config.js/.mjs/.ts , etc.) to be located and executed. Because no VS Code workspace-trust state is consulted, an untrusted workspace can keep the flag true and place a malicious .cspell.config.js ; opening the workspace causes the extension host to execute attacker-controlled Node.js code with the user’s privileges. This vulnerability is fixed in v4.5.4.

CVSS v3
7.8
EG Score
7.8(medium)
EG Risk
—
EPSS
2.7%
KEV
Not listed

Published

February 9, 2026

Last Modified

April 15, 2026

Advisory Details (4)

Auto-updated Jun 10, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github_release, github.
github Patch Available🟡 PoC Available

Workspace-trust bypass Code Execution · Advisory · streetsidesoftware/vscode-spell-checker · GitHub

https://github.com/streetsidesoftware/vscode-spell-checker/security/advisories/GHSA-mggq-68mr-58vj
github_release Patch Available

code-spell-checker: v4.5.4

Patch available: streetsidesoftware/vscode-spell-checker code-spell-checker-v4.5.4 (pre-release)

https://github.com/streetsidesoftware/vscode-spell-checker/releases/tag/code-spell-checker-v4.5.4
github_commit Patch Available

commit f39af9a3a6f2 (streetsidesoftware/vscode-spell-checker)

Patch available: streetsidesoftware/vscode-spell-checker code-spell-checker-v4.5.4 (contains commit f39af9a3a6f2)

https://github.com/streetsidesoftware/vscode-spell-checker/commit/f39af9a3a6f2a939a57171a24161ed735d41c575
generic

Workspace-trust bypass Code Execution.pdf - Google Drive

https://drive.google.com/file/d/1mT4SOkkHSHU6NFfKwekysydAd3FUAC6K/view?usp=sharing

Weakness Classification(3)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 50× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 116 total refreshes for this CVE.

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Frequently asked(5)

What is CVE-2026-25931?
CVE-2026-25931 is a high vulnerability published on February 9, 2026. vscode-spell-checker is a basic spell checker that works well with code and documents. Prior to v4.5.4, DocumentSettings._determineIsTrusted treats the configuration value cSpell.trustedWorkspace as the authoritative trust flag. The value defaults to true (package.json) and is read from workspace…
When was CVE-2026-25931 disclosed?
CVE-2026-25931 was first published in the National Vulnerability Database on February 9, 2026, with the most recent update on April 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-25931 actively exploited?
CVE-2026-25931 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.7% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-25931?
CVE-2026-25931 has a CVSS v3 base score of 7.8 (NVD).
How do I remediate CVE-2026-25931?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-25931, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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