{"id":"CVE-2017-11173","url":"https://www.cyber-defence.io/tools/cve/CVE-2017-11173","generatedAt":"2026-10-28T19:04:50.458Z","title":"Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests.","description":"Missing anchor in generated regex for rack-cors before 0.4.1 allows a malicious third-party site to perform CORS requests. If the configuration were intended to allow only the trusted example.com domain name and not the malicious example.net domain name, then example.com.example.net (as well as example.com-example.net) would be inadvertently allowed.","published":"2017-07-13T03:29:00.000Z","lastModified":"2026-06-17T01:01:21.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":[],"affected":["rack-cors project/rack-cors","debian/debian linux"],"epss":{"score":0.02345,"percentile":0.83564,"date":"2026-10-27","history":[]},"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 (2.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"http://seclists.org/fulldisclosure/2017/Jul/22","tags":["Mailing List","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"http://www.debian.org/security/2017/dsa-3931","tags":["Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.html","tags":["Third Party Advisory","VDB Entry"],"source":"cve@mitre.org"},{"url":"http://seclists.org/fulldisclosure/2017/Jul/22","tags":["Mailing List","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.debian.org/security/2017/dsa-3931","tags":["Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/cyu/rack-cors/commit/42ebe6caa8e85ffa9c8a171bda668ba1acc7a5e6","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://packetstormsecurity.com/files/143345/rack-cors-Missing-Anchor.html","tags":["Third Party Advisory","VDB Entry"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2017-11173","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."}