{"id":"CVE-2026-30229","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-30229","generatedAt":"2026-10-28T03:28:38.349Z","title":"This allows a read-only credential to impersonate arbitrary users with full read and write access to their data.","description":"Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.6 and 9.5.0-alpha.4, the readOnlyMasterKey can call POST /loginAs to obtain a valid session token for any user. This allows a read-only credential to impersonate arbitrary users with full read and write access to their data. Any Parse Server deployment that uses readOnlyMasterKey is affected. This issue has been patched in versions 8.6.6 and 9.5.0-alpha.4.","published":"2026-03-06T21:16:17.000Z","lastModified":"2026-06-17T10:32:32.000Z","status":"Analyzed","sourceIdentifier":"security-advisories@github.com","cvss":{"version":"4.0","score":8.5,"severity":"HIGH","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/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-863"],"affected":["parseplatform/parse-server"],"epss":{"score":0.00403,"percentile":0.34354,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.40%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/parse-community/parse-server/releases/tag/8.6.6","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.4","tags":["Product","Release Notes"],"source":"security-advisories@github.com"},{"url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-79wj-8rqv-jvp5","tags":["Vendor Advisory"],"source":"security-advisories@github.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-30229","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."}