CVE-2026-3418
Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution
Description
The System REST API accepts user-supplied file uploads without enforcing sufficient validation on the file type or destination, allowing files to be written to arbitrary server-accessible locations. Exploitation requires authenticated administrative access with publisher privileges. Successful exploitation permits an authenticated publisher to upload files to server-accessible locations. Depending on the deployment environment and how uploaded files are handled, this could lead to the execution of uploaded content, potentially resulting in remote code execution.
INFO
Published Date :
Aug. 6, 2026, 10:17 p.m.
Last Modified :
Aug. 6, 2026, 10:17 p.m.
Remotely Exploit :
Yes !
Source :
ed10eef1-636d-4fbe-9993-6890dfa878f8
Affected Products
The following products are affected by CVE-2026-3418
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | CRITICAL | ed10eef1-636d-4fbe-9993-6890dfa878f8 |
Solution
- Validate uploaded file types rigorously.
- Restrict upload destinations to secure locations.
- Sanitize all user-supplied input.
- Apply principle of least privilege.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-3418.
| URL | Resource |
|---|---|
| https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/ |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-3418 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-3418
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-3418 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-3418 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
New CVE Received by ed10eef1-636d-4fbe-9993-6890dfa878f8
Aug. 06, 2026
Action Type Old Value New Value Added Affected [{'vendor': 'WSO2', 'product': 'WSO2 API Manager', 'versions': [{'status': 'affected', 'version': '4.4.0', 'lessThan': '4.4.0.67', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.52', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.16', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 Traffic Manager', 'versions': [{'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.51', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.16', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 API Control Plane', 'versions': [{'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.53', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.17', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 Universal Gateway', 'versions': [{'status': 'affected', 'version': '4.5.0', 'lessThan': '4.5.0.52', 'versionType': 'custom'}, {'status': 'affected', 'version': '4.6.0', 'lessThan': '4.6.0.16', 'versionType': 'custom'}], 'defaultStatus': 'unaffected'}, {'vendor': 'WSO2', 'product': 'WSO2 Carbon API Management Implementation', 'versions': [{'status': 'affected', 'version': '9.30.67', 'lessThan': '9.30.67.156', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.31.86', 'lessThan': '9.31.86.141', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.32.147', 'lessThan': '9.32.147.44', 'versionType': 'custom'}, {'status': 'unaffected', 'version': '9.33.104', 'versionType': 'custom', 'lessThanOrEqual': '*'}], 'packageName': 'org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.impl', 'defaultStatus': 'unknown'}, {'vendor': 'WSO2', 'product': 'WSO2 API Manager Publisher REST API V4', 'versions': [{'status': 'affected', 'version': '9.30.67', 'lessThan': '9.30.67.156', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.31.86', 'lessThan': '9.31.86.141', 'versionType': 'custom'}, {'status': 'affected', 'version': '9.32.147', 'lessThan': '9.32.147.44', 'versionType': 'custom'}, {'status': 'unaffected', 'version': '9.33.104', 'versionType': 'custom', 'lessThanOrEqual': '*'}], 'packageName': 'org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.rest.api.publisher.v1.common', 'defaultStatus': 'unknown'}, {'vendor': 'WSO2', 'product': 'WSO2 Carbon API Management API', 'versions': [{'status': 'affected', 'version': '9.30.67', 'lessThan': '9.30.67.156', 'versionType': 'custom'}, {'status': 'unaffected', 'version': '9.33.104', 'versionType': 'custom', 'lessThanOrEqual': '*'}], 'packageName': 'org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.api', 'defaultStatus': 'unknown'}] Added Description The System REST API accepts user-supplied file uploads without enforcing sufficient validation on the file type or destination, allowing files to be written to arbitrary server-accessible locations. Exploitation requires authenticated administrative access with publisher privileges. Successful exploitation permits an authenticated publisher to upload files to server-accessible locations. Depending on the deployment environment and how uploaded files are handled, this could lead to the execution of uploaded content, potentially resulting in remote code execution. Added CVSS V3.1 AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-434 Added Reference https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5146/