{"id":"CVE-2023-26135","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-26135","generatedAt":"2026-10-28T03:41:38.614Z","title":"All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.","description":"All versions of the package flatnest are vulnerable to Prototype Pollution via the nest() function in the flatnest/nest.js file.","published":"2023-06-30T05:15:09.000Z","lastModified":"2026-06-17T05:42:45.000Z","status":"Modified","sourceIdentifier":"report@snyk.io","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-1321"],"affected":["flatnest project/flatnest"],"epss":{"score":0.00892,"percentile":0.59239,"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 (0.89%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js%23L43","tags":["Broken Link"],"source":"report@snyk.io"},{"url":"https://github.com/brycebaril/node-flatnest/commit/27d569baf9d9d25677640edeaf2d13af165868d6","source":"report@snyk.io"},{"url":"https://github.com/brycebaril/node-flatnest/issues/4","tags":["Exploit","Issue Tracking"],"source":"report@snyk.io"},{"url":"https://security.snyk.io/vuln/SNYK-JS-FLATNEST-3185149","tags":["Exploit","Third Party Advisory"],"source":"report@snyk.io"},{"url":"https://github.com/brycebaril/node-flatnest/blob/b7d97ec64a04632378db87fcf3577bd51ac3ee39/nest.js%23L43","tags":["Broken Link"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/brycebaril/node-flatnest/commit/27d569baf9d9d25677640edeaf2d13af165868d6","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://github.com/brycebaril/node-flatnest/issues/4","tags":["Exploit","Issue Tracking"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.snyk.io/vuln/SNYK-JS-FLATNEST-3185149","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-26135","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."}