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CVE-2026-40076— OpenMRS Core arbitrary file write and code execution via Zip Slip in module upload

Quick assessment

Affected
openmrs openmrs-core
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

openmrs-core是OpenMRS开源的一款电子病历系统。 openmrs-core 2.7.8及之前版本和2.8.0至2.8.5版本存在路径遍历漏洞，该漏洞源于模块上传端点对上传的.omod归档文件自动解压时未进行规范化或边界检查，可能导致Zip Slip路径遍历攻击，使经过身份验证的攻击者写入任意文件并实现远程代码执行。

AI Predicted 9.8 Difficulty: Trivial EPSS 0.85% · P56

Affected Version Matrix 2

VendorProduct Version RangeStatus
openmrs openmrs-core <= 2.7.8 affected
>= 2.8.0, <= 2.8.5 affected
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I. Basic Information for CVE-2026-40076

Vulnerability Information
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Vulnerability Title
OpenMRS Core arbitrary file write and code execution via Zip Slip in module upload
Source: CVE Program / CVE List V5
Vulnerability 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. An 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
openmrs-core 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
openmrs-core是OpenMRS开源的一款电子病历系统。 openmrs-core 2.7.8及之前版本和2.8.0至2.8.5版本存在路径遍历漏洞，该漏洞源于模块上传端点对上传的.omod归档文件自动解压时未进行规范化或边界检查，可能导致Zip Slip路径遍历攻击，使经过身份验证的攻击者写入任意文件并实现远程代码执行。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
openmrs openmrs-core <= 2.7.8 -

II. Public POCs for CVE-2026-40076

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III. Intelligence Information for CVE-2026-40076

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Vendor Advisories for CVE-2026-40076 (1)

IV. Related Vulnerabilities

Same product: openmrs-core
Same vendor: openmrs
Same weakness: CWE-22

V. Comments for CVE-2026-40076

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