CVE-2026-86540
NVD: knowns versions before 0.30.0 fail to validate the settings.lsp.languages binary field in project configuration files, allowing attackers to execute arbitrary binaries by crafting a malicious .knowns/config.json file. NVD: When a repository with a crafted configuration is opened, the unvalidated binary path is executed twice under the user's account without any verification. OSV: knowns before 0.30.0 Arbitrary Code Execution via LSP Binary
8.5 Severity
HIGH EPSS
0.0014 (4) KEV
-
Source-published summary
NVD: knowns versions before 0.30.0 fail to validate the settings.lsp.languages binary field in project configuration files, allowing attackers to execute arbitrary binaries by crafting a malicious .knowns/config.json file. NVD: When a repository with a crafted configuration is opened, the unvalidated binary path is executed twice under the user's account without any verification. OSV: knowns before 0.30.0 Arbitrary Code Execution via LSP Binary
Possible impact
Source describes code execution review. Possible impact: An attacker may be able to run code or commands on affected systems.
Affected context
Affected product or version requires source confirmation.
Remediation / advisory
Remediation reference present; patch status requires confirmation in the linked advisory.
Why it matters
Source describes code execution review. Possible impact: An attacker may be able to run code or commands on affected systems.; CVSS 8.5 (HIGH); EPSS percentile 4; not listed in KEV; Remediation reference present; patch status requires confirmation in the linked advisory; sources: NVD, OSV.
What to verify
Confirm affected product/version, vendor advisory, patch or mitigation, and exposure.
Exposure hint
exposure unknown
Impact tags
Urgency reasons
Source-derived note
Summary derived from NVD / OSV description; unsafe procedural detail is not shown.
Redaction metadata
- source summary used
- True
- fallback summary used
- False
- unsafe procedural detail present
- false
- raw source displayed
- false
- public summary redacted
- true
Remediation handoff
Public-safe static handoff for human/Codex remediation planning. Scan, patch, external execution, and auto remediation are disabled.
Safety note
This radar shows source-published defensive context only. Exploit procedures, exploit strings, scanner commands, and auto-remediation are not provided.