{"dataType":"CVE_RECORD","dataVersion":"1.0","cveMetadata":{"cveId":"GCVE-110-OSM-2026-14303","assignerOrgId":"","assignerShortName":"Vulnetix","state":"PUBLISHED","datePublished":"2026-10-31T09:00:51Z","dateUpdated":"2026-10-30T12:20:12Z","dateReserved":""},"containers":{"cna":{"providerMetadata":null,"title":"","descriptions":[{"lang":"en","value":"The official Claude Code extension on the Cursor Marketplace has been compromised, and a threat actor published version 2.1.313.  This malicious extension only affects the Cursor version of the extension and not any other registry version of it.\n\n\n\n\nThe payload installed a persistent SSH based backdoor and RAT like functionality.1. Added an attacker-controlled key labeled svc-telemetry to ~/.ssh/authorized_keys.\n2. Attempted to enable the machine’s SSH service or macOS Remote Login.\n3. Opened a persistent reverse SSH tunnel to 134.209.82.225, forwarding the victim’s local SSH port.\n4. Installed persistence:\n      • macOS: fake com.apple.sysmond LaunchAgent\n      • Linux: @reboot cron entry\n      • Windows: SysMon scheduled task or Startup-folder fallback\n\n5. Collected hostname, username, platform, architecture, home directory, working directory, Git email, public IP, and names of environment variables suggesting credentials.\n6. Sent that reconnaissance as JSON to 134.209.82.225:8099/beacon.\n7. Suppressed errors so the legitimate extension continued operating normally.","supportingMedia":null}],"references":[{"url":"https://opensourcemalware.com/threats/37513700-8f49-4734-94fb-ce580584e9fc","name":"Malicious vscode package: anthropic.claude-code","tags":["advisory"]},{"url":"https://marketplace.visualstudio.com/anthropic.claude-code","name":"","tags":["vendor"]}],"metrics":[{"format":"CVSS_V3","scenarios":null,"cvssV2_0":null,"cvssV3_0":null,"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H","baseScore":9.6,"baseSeverity":"CRITICAL"},"cvssV4_0":null,"other":null}],"problemTypes":[{"descriptions":[{"lang":"en","description":"Embedded Malicious Code","cweId":"CWE-506","type":"CWE"}]}],"affected":[{"vendor":"unknown","product":"anthropic.claude-code","collectionURL":"https://marketplace.visualstudio.com","packageName":"anthropic.claude-code","repo":"","defaultStatus":"affected","versions":[{"version":"2.1.313","status":"affected","versionType":"","lessThan":"","lessThanOrEqual":"","changes":null}],"cpes":null,"modules":null,"programFiles":null,"platforms":null}],"cpeApplicability":null,"rejectedReasons":null,"replacedBy":null},"adp":null}}