# Arbitrary File Upload via System REST API in Multiple WSO2 Products Allows Remote Code Execution CVE record · `CVE-2026-3418` - **Identifiers:** `CVE-2026-3418` - **State:** Confirmed - **Severity:** CVSS 9.1 Critical - **Critical:** Yes: CVSS 9+ - **CNA:** WSO2 - **Weakness (CWE):** [CWE-434](https://cwe.mitre.org/data/definitions/434.html) - **Tags:** [Unrestricted file upload](https://agentprime.io/advisories/tag/file-upload.md) - **Technologies:** [WSO2 API Manager](https://agentprime.io/advisories/technology/wso2-api-manager.md) · [WSO2 Traffic Manager](https://agentprime.io/advisories/technology/wso2-traffic-manager.md) · [WSO2 API Control Plane](https://agentprime.io/advisories/technology/wso2-api-control-plane.md) · [WSO2 Universal Gateway](https://agentprime.io/advisories/technology/wso2-universal-gateway.md) · [WSO2 Carbon API Management Implementation](https://agentprime.io/advisories/technology/wso2-carbon-api-management-implementation.md) · [WSO2 API Manager Publisher REST API V4](https://agentprime.io/advisories/technology/wso2-api-manager-publisher-rest-api-v4.md) · [WSO2 Carbon API Management API](https://agentprime.io/advisories/technology/wso2-carbon-api-management-api.md) - **Published:** 6 Aug 2026 - **Updated:** 23 Sept 2026 - **Reviewed by a person:** No Published by the CVE Program (CNA: WSO2) at 6 Aug 2026, 17:32 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. ## Critical Critical, because: - CVSS score 9.1: 9.0 or more. How we decide what’s critical: ## Affected products, as the CNA wrote them - Vendor: WSO2. Product: WSO2 API Manager. - affected: `4.4.0 to before 4.4.0.67` (custom) - affected: `4.5.0 to before 4.5.0.52` (custom) - affected: `4.6.0 to before 4.6.0.16` (custom) - Other versions: unaffected - Vendor: WSO2. Product: WSO2 Traffic Manager. - affected: `4.5.0 to before 4.5.0.51` (custom) - affected: `4.6.0 to before 4.6.0.16` (custom) - Other versions: unaffected - Vendor: WSO2. Product: WSO2 API Control Plane. - affected: `4.5.0 to before 4.5.0.53` (custom) - affected: `4.6.0 to before 4.6.0.17` (custom) - Other versions: unaffected - Vendor: WSO2. Product: WSO2 Universal Gateway. - affected: `4.5.0 to before 4.5.0.52` (custom) - affected: `4.6.0 to before 4.6.0.16` (custom) - Other versions: unaffected - Vendor: WSO2. Product: WSO2 Carbon API Management Implementation. - affected: `9.30.67 to before 9.30.67.156` (custom) - affected: `9.31.86 to before 9.31.86.141` (custom) - affected: `9.32.147 to before 9.32.147.44` (custom) - unaffected: `9.33.104 to *, inclusive` (custom) - Other versions: unknown - Package name: `org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.impl` - Vendor: WSO2. Product: WSO2 API Manager Publisher REST API V4. - affected: `9.30.67 to before 9.30.67.156` (custom) - affected: `9.31.86 to before 9.31.86.141` (custom) - affected: `9.32.147 to before 9.32.147.44` (custom) - unaffected: `9.33.104 to *, inclusive` (custom) - Other versions: unknown - Package name: `org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.rest.api.publisher.v1.common` - Vendor: WSO2. Product: WSO2 Carbon API Management API. - affected: `9.30.67 to before 9.30.67.156` (custom) - unaffected: `9.33.104 to *, inclusive` (custom) - Other versions: unknown - Package name: `org.wso2.carbon.apimgt:org.wso2.carbon.apimgt.api` ## Not analysed yet We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter. ## Severity and exploitation - 9.1 Critical, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H`, from CNA (WSO2) - **CISA KEV:** Not listed. - **EPSS:** 0.0076, the 55th percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days. ## Timeline This record came from the full history of the CVE Program, published 6 Aug 2026. New records show when each source confirmed them. ## Sources - [CVE List: CVE-2026-3418](https://www.cve.org/CVERecord?id=CVE-2026-3418) - [NVD: CVE-2026-3418](https://nvd.nist.gov/vuln/detail/CVE-2026-3418) ### References from the CNA - (vendor-advisory) Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description. ## Check whether this affects you This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run. - With the agentprime MCP server (), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: - As JSON: - Everything that needs attention now: --- The web page: . Everything for agents: .