{"id":"CVE-2026-102878","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-102878","generatedAt":"2026-10-28T03:39:25.864Z","title":"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.","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.","published":"2026-09-29T20:17:19.000Z","lastModified":"2026-09-30T17:32:07.000Z","status":"Deferred","sourceIdentifier":"disclosure@vulncheck.com","cvss":{"version":"4.0","score":8.6,"severity":"HIGH","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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-346"],"affected":[],"epss":{"score":0.00798,"percentile":0.56326,"date":"2026-10-27","history":[{"date":"2026-09-30","score":0.00235,"percentile":0.13054}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.80%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"new","label":"New CVE","at":"2026-09-29T20:17:19.000Z","detail":{"score":"8.6","severity":"HIGH","publishedAt":"2026-09-29T20:17:18.620Z"},"summary":"New CVE, high severity (CVSS 8.6)."}],"references":[{"url":"https://github.com/hangwin/mcp-chrome","source":"disclosure@vulncheck.com"},{"url":"https://github.com/hangwin/mcp-chrome/blob/v1.0.0/app/native-server/src/server/index.ts","source":"disclosure@vulncheck.com"},{"url":"https://github.com/hangwin/mcp-chrome/issues/384","source":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/mcp-chrome-bridge-through-1.0.31-cors-origin-bypass","source":"disclosure@vulncheck.com"},{"url":"https://github.com/hangwin/mcp-chrome/issues/384","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-102878","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}