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CVE-2026-3418

CRITICALCVSS 9.1/10EPSS 0.57%

Last modified

CVE-2026-3418 is a critical-severity vulnerability rated 9.1/10 on the CVSS scale. 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. EPSS estimates a 0.57% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1
9.1/10

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

EPSS Probability
0.57%

45.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
WSO2WSO2 API Manager>= 4.4.0, < 4.4.0.67; >= 4.5.0, < 4.5.0.52; >= 4.6.0, < 4.6.0.16
WSO2WSO2 Traffic Manager>= 4.5.0, < 4.5.0.51; >= 4.6.0, < 4.6.0.16
WSO2WSO2 API Control Plane>= 4.5.0, < 4.5.0.53; >= 4.6.0, < 4.6.0.17
WSO2WSO2 Universal Gateway>= 4.5.0, < 4.5.0.52; >= 4.6.0, < 4.6.0.16
WSO2WSO2 Carbon API Management Implementation>= 9.30.67, < 9.30.67.156; >= 9.31.86, < 9.31.86.141; >= 9.32.147, < 9.32.147.44
WSO2WSO2 API Manager Publisher REST API V4>= 9.30.67, < 9.30.67.156; >= 9.31.86, < 9.31.86.141; >= 9.32.147, < 9.32.147.44
WSO2WSO2 Carbon API Management API>= 9.30.67, < 9.30.67.156

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2026-3418?
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.
How severe is CVE-2026-3418?
CVE-2026-3418 has a CVSS score of 9.1/10 (CRITICAL severity). The EPSS model estimates a 0.57% probability of exploitation in the next 30 days.
How do I fix CVE-2026-3418?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST