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CVE-2026-40076 OpenMRS

Affected softwareOpenMRS
Severity9.4 Critical CVSS 4.0 2 scores
WeaknessPath traversal (CWE-22)
Published6 May 2026
Updated26 Oct 2026

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.

Exploitation status

Proof of concept only

A proof of concept exists, but no reviewed exploit catalogue lists this CVE.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: poc CISA recorded that an exploit has been demonstrated. Automatable: no, technical impact: total.
  • Indexed PoC none indexed
  • EPSS 0.85% chance in 30 days

Waratek protection

Protected by Waratek

Waratek has a rule that blocks attacks on this vulnerability.

Decided by A vulnerability class already blocked by an ARMR security rule
Finding Protected by Waratek's ARMR path-traversal security rule, which blocks this class of attack at the JVM level without a rule written for this CVE specifically. The CVE's weakness is CWE-22: Path Traversal.
Candidate fix https://github.com/openmrs/openmrs-core/security/advisories/GHSA-78fc-9688-w8xw : the maintainers' own security advisory: names the version that fixes it, so the fix is the difference between two releases

How to mitigate CVE-2026-40076

Apply the vendor's fix for OpenMRS. Until you can, Waratek RASP blocks exploitation with its path traversal rule. It runs inside the Java application, with no code changes.

Waratek RASP Runtime protection for Java applications

CVSS

9.4 CRITICAL v4.0 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X 2 metrics

We show the highest score from the newest CVSS version. Scores from different versions can't be compared, and the first score listed is sometimes a 0.0 placeholder.

VersionScoreBandVectorAssignerType
CVSS 4.0 9.4 CRITICAL 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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X security-advisories@github.com Secondary published
CVSS 3.1 8.8 HIGH CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H NVD Primary

Affected software and releases

Maven packages

Affected and fixed versions, from OSV.dev
PackageIntroducedFixedLast affected
org.openmrs.web:openmrs-web 0 none 2.7.8
org.openmrs.web:openmrs-web 2.8.0 none 2.8.5

Products and versions

2 products, 4 version entries
SourceVendorProductSchemeAffected versions
nvd openmrs openmrs generic ≤ 2.7.8 · ≥ 2.8.0 and ≤ 2.8.5
osv org.openmrs.web openmrs-web generic ≤ 2.7.8 · ≥ 2.8.0 and ≤ 2.8.5

References

URLTags
https://github.com/openmrs/openmrs-core/security/advisories/GHSA-78fc-9688-w8xw advisory
https://github.com/openmrs/openmrs-core PACKAGE

Timeline

Published2026-05-06By the CVE Program.
NVD record modified2026-10-26NVD's own last-modified date for this record.