{"id":"CVE-2026-31901","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-31901","generatedAt":"2026-10-28T02:10:36.552Z","title":"An attacker can send requests with different email addresses and observe the error codes to determine which email addresses are registered in the application.","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 8.6.34 and 9.6.0-alpha.8, the email verification endpoint (/verificationEmailRequest) returns distinct error responses depending on whether an email address belongs to an existing user, is already verified, or does not exist. An attacker can send requests with different email addresses and observe the error codes to determine which email addresses are registered in the application. This is a user enumeration vulnerability that affects any Parse Server deployment with email verification enabled (verifyUserEmails: true). This vulnerability is fixed in 8.6.34 and 9.6.0-alpha.8.","published":"2026-03-11T20:16:16.000Z","lastModified":"2026-06-17T10:34:44.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":6.3,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/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-204"],"affected":["parseplatform/parse-server"],"epss":{"score":0.00246,"percentile":0.15684,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/parse-community/parse-server/releases/tag/8.6.34","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/parse-community/parse-server/releases/tag/9.6.0-alpha.8","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-w54v-hf9p-8856","tags":["Patch","Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-31901","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."}