{"cve":"CVE-2026-44594","nvd":{"published":"2026-05-28T16:16:24.717","modified":"2026-10-26T13:10:00.140","status":"Deferred","description":"esm.sh is a no-build content delivery network (CDN) for web development. In 137 and earlier, a Local File Inclusion (LFI) vulnerability exists in the esbuild plugin's handling of the browser field in package.json. An attacker can publish an npm package that causes the server to read and return arbitrary files from the host filesystem during the build process.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5},"cwes":["CWE-22"],"references":["https://github.com/esm-dev/esm.sh/security/advisories/GHSA-rg65-45m7-hq57","https://github.com/esm-dev/esm.sh/security/advisories/GHSA-rg65-45m7-hq57"],"products":[],"source":"nvd","synced_at":"2026-10-26T13:39:24.642594360+00:00"},"epss":{"cve":"CVE-2026-44594","score":0.00321,"percentile":0.2486,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-rg65-45m7-hq57","url":"https://osv.dev/vulnerability/GHSA-rg65-45m7-hq57","summary":"esm.sh: Path Traversal via package.json browser field allows reading arbitrary server files","modified":"2026-06-25T23:11:31.219941117Z","packages":[{"ecosystem":"Go","name":"github.com/esm-dev/esm.sh","purl":"pkg:golang/github.com/esm-dev/esm.sh","ranges":["<0.0.0-20250616164159-0593516c4cfa"],"fixed":["0.0.0-20250616164159-0593516c4cfa"]}]},{"id":"GO-2026-5620","url":"https://osv.dev/vulnerability/GO-2026-5620","summary":"esm.sh: Path Traversal via package.json browser field allows reading arbitrary server files in github.com/esm-dev/esm.sh","modified":"2026-06-25T23:01:34.250707541Z","packages":[{"ecosystem":"Go","name":"github.com/esm-dev/esm.sh","purl":"pkg:golang/github.com/esm-dev/esm.sh","ranges":["<0.0.0-20250616164159-0593516c4cfa"],"fixed":["0.0.0-20250616164159-0593516c4cfa"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}