{"cve":"CVE-2026-23644","nvd":{"published":"2026-01-18T23:15:48.547","modified":"2026-06-17T10:21:52.957","status":"Analyzed","description":"esm.sh is a no-build content delivery network (CDN) for web development. Prior to Go pseeudoversion 0.0.0-20260116051925-c62ab83c589e, the software has a path traversal vulnerability due to an incomplete fix. `path.Clean` normalizes a path but does not prevent absolute paths in a malicious tar file. Commit https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16, corresponding to pseudoversion 0.0.0-20260116051925-c62ab83c589e, fixes this issue.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:P","score":7.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},"cwes":["CWE-22"],"references":["https://github.com/esm-dev/esm.sh/commit/9d77b88c320733ff6689d938d85d246a3af9af16","https://github.com/esm-dev/esm.sh/commit/c62ab83c589e7b421a0e1376d2a00a4e48161093","https://github.com/esm-dev/esm.sh/security/advisories/GHSA-2657-3c98-63jq","https://pkg.go.dev/vuln/GO-2025-4138"],"products":["esm:esm.sh"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-23644","score":0.0056,"percentile":0.46609,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-2657-3c98-63jq","url":"https://osv.dev/vulnerability/GHSA-2657-3c98-63jq","summary":"esm.sh has a path traversal in extractPackageTarball enables file writes from malicious packages","modified":"2026-09-10T03:50:32.291130613Z","packages":[{"ecosystem":"Go","name":"github.com/esm-dev/esm.sh","purl":"pkg:golang/github.com/esm-dev/esm.sh","ranges":[">=0.0.1 <=136"],"fixed":[]},{"ecosystem":"Go","name":"github.com/esm-dev/esm.sh","purl":"pkg:golang/github.com/esm-dev/esm.sh","ranges":["<0.0.0-20260116051925-c62ab83c589e"],"fixed":["0.0.0-20260116051925-c62ab83c589e"]}]},{"id":"GO-2026-4332","url":"https://osv.dev/vulnerability/GO-2026-4332","summary":"esm.sh has a path traversal in extractPackageTarball enables file writes from malicious packages","modified":"2026-02-26T18:56:10.373396Z","packages":[{"ecosystem":"Go","name":"github.com/esm-dev/esm.sh","purl":"pkg:golang/github.com/esm-dev/esm.sh","ranges":["<0.0.0-20260116051925-c62ab83c589e"],"fixed":["0.0.0-20260116051925-c62ab83c589e"]}]}],"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."]}