{"cve":"CVE-2026-40076","nvd":{"published":"2026-05-06T20:16:31.727","modified":"2026-10-26T19:10:00.163","status":"Analyzed","description":"OpenMRS Core is an open source electronic medical record system platform. In versions 2.7.8 and earlier and versions 2.8.0 through 2.8.5, the module upload endpoint at POST `/openmrs/ws/rest/v1/module` is vulnerable to a Zip Slip path traversal attack. During automatic extraction of uploaded .omod archives in `WebModuleUtil.startModule()`, ZIP entries under web/module/ are checked only to see whether the full entry path starts with `..,` and the remaining path is then concatenated into the destination path without normalization or a boundary check. A crafted archive can therefore include entries such as `web/module/../../../../malicious.jsp` and cause files to be written outside the intended module directory.\n\nAn authenticated attacker with module upload access can write arbitrary files to locations such as the web application root and achieve remote code execution by uploading a JSP file and then requesting it. The issue is compounded by the fact that the module.allow_web_admin runtime property is enforced in the legacy UI controller but not in the REST API upload path, so deployments relying on that property to block web-based module administration remain exposed through the REST endpoint. This issue has been fixed in versions after 2.7.8 in the 2.7.x line and in version 2.8.6 and later.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H","score":9.4},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8},"cwes":["CWE-22"],"references":["https://github.com/openmrs/openmrs-core/security/advisories/GHSA-78fc-9688-w8xw","https://github.com/openmrs/openmrs-core/security/advisories/GHSA-78fc-9688-w8xw"],"products":["openmrs:openmrs"],"source":"nvd","synced_at":"2026-10-26T19:31:02.781428341+00:00"},"epss":{"cve":"CVE-2026-40076","score":0.00853,"percentile":0.57999,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-78fc-9688-w8xw","url":"https://osv.dev/vulnerability/GHSA-78fc-9688-w8xw","summary":"OpenMRS Module Upload Vulnerable to Path Traversal (Zip Slip)","modified":"2026-05-08T19:34:46.952898Z","packages":[{"ecosystem":"Maven","name":"org.openmrs.web:openmrs-web","purl":"pkg:maven/org.openmrs.web/openmrs-web","ranges":["<=2.7.8"],"fixed":[]},{"ecosystem":"Maven","name":"org.openmrs.web:openmrs-web","purl":"pkg:maven/org.openmrs.web/openmrs-web","ranges":[">=2.8.0 <=2.8.5"],"fixed":[]}]}],"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."]}