Vulnerability · Published Apr 21, 2026 · Assigned by GitHub_M

CVE-2026-40866Horilla: Unauthorized Document Overwrite via File Upload Endpoint

High 8.6

In plain English

A high-severity improper access control in horilla from horilla-opensource. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 11% of all known vulnerabilities).

Severity (CVSS 4.0)8.6High

Exploit odds (30 days)0.2%top 89.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Horilla is a free and open source Human Resource Management System (HRMS). In 1.5.0, an insecure direct object reference in the employee document upload endpoint allows any authenticated user to overwrite or replace or corrupt another employee’s document by changing the document ID in the upload request. This enables unauthorized modification of HR records.

Affected products (as reported)

Vendor	Product	Versions
horilla-opensource	horilla	1.5.0

Weakness: CWE-284, CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/horilla/horilla-hr/security/advisories/GHSA-q2qh-v828-r4p7 x_refsource_CONFIRM