{"id":"CVE-2026-102878","state":"PUBLISHED","title":"mcp-chrome-bridge through 1.0.31 CORS Origin Bypass","description":"mcp-chrome-bridge through 1.0.31 contains an origin validation error in the native-server HTTP API that allows attackers to bypass CORS restrictions. Attackers can craft malicious web pages that make cross-origin requests to the local server and invoke browser automation tools including script execution, page content reading, and screenshot capture.","publishedAt":"2026-09-29T20:01:07.610Z","updatedAt":"2026-09-29T20:19:14.663Z","severity":{"score":8.6,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["hangwin mcp-chrome-bridge"],"affected":[{"vendor":"hangwin","product":"mcp-chrome-bridge","packageURL":"pkg:npm/mcp-chrome-bridge","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.0.31","versionType":"custom"}]}],"references":["https://github.com/hangwin/mcp-chrome/issues/384","https://github.com/hangwin/mcp-chrome/blob/v1.0.0/app/native-server/src/server/index.ts","https://github.com/hangwin/mcp-chrome","https://www.vulncheck.com/advisories/mcp-chrome-bridge-through-1.0.31-cors-origin-bypass"],"weaknesses":["CWE-346"],"ingestedAt":"2026-10-29T20:10:13.529Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/102xxx/CVE-2026-102878.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-102878","state":"PUBLISHED","datePublished":"2026-09-29T20:01:07.610Z","dateUpdated":"2026-09-29T20:19:14.663Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-29T17:33:19.455Z"},"containers":{"cna":{"title":"mcp-chrome-bridge through 1.0.31 CORS Origin Bypass","descriptions":[{"lang":"en","value":"mcp-chrome-bridge through 1.0.31 contains an origin validation error in the native-server HTTP API that allows attackers to bypass CORS restrictions. Attackers can craft malicious web pages that make cross-origin requests to the local server and invoke browser automation tools including script execution, page content reading, and screenshot capture."}],"affected":[{"vendor":"hangwin","product":"mcp-chrome-bridge","packageURL":"pkg:npm/mcp-chrome-bridge","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"1.0.31","versionType":"custom"}]}],"references":[{"url":"https://github.com/hangwin/mcp-chrome/issues/384","tags":["issue-tracking"]},{"url":"https://github.com/hangwin/mcp-chrome/blob/v1.0.0/app/native-server/src/server/index.ts","tags":["technical-description"]},{"url":"https://github.com/hangwin/mcp-chrome","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/mcp-chrome-bridge-through-1.0.31-cors-origin-bypass","name":"VulnCheck Advisory: mcp-chrome-bridge through 1.0.31 CORS Origin Bypass","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"PASSIVE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.6,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-346","lang":"en","description":"Origin Validation Error","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-29T20:01:07.610Z"},"datePublic":"2026-09-04T00:00:00.000Z","credits":[{"lang":"en","value":"George Chen","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/hangwin/mcp-chrome/issues/384","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-29T20:18:47.075987Z","id":"CVE-2026-102878","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-29T20:19:14.663Z"}}]}}}