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CVEs / CVE-2026-5430

CVE-2026-5430: WSO2 Multiple Products Path Traversal Vulnerability

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Summary

WSO2 API Control Plane, API Manager, Traffic Manager & Universal Gateway contain a path traversal vulnerability that could allow for unrestricted file upload and lead to remote code execution.

CISA, Known Exploited Vulnerabilities catalog

Description

The JWT authentication mechanism accepts tokens signed with algorithms other than those explicitly configured or supported. This allows an attacker to craft a JWT with an unsupported algorithm, which is then incorrectly validated, leading to unauthorized access. Successful exploitation of this vulnerability may result in unauthorized access to the system, including the potential compromise of administrative accounts and full account takeover. The CVSS score is adjusted to 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H) in single-tenant deployments, reflecting that the impact is contained within a single security authority boundary.

The CVE record, via NVD · published 6 Aug 2026 · NVD status: Analyzed

Affected and fixed versions

As stated by the CVE record (from the CNA)
ProductAffectedFixed in
WSO2 WSO2 Universal Gatewayfrom 4.5.0, before 4.5.0.574.5.0.57
WSO2 WSO2 Universal Gatewayfrom 4.6.0, before 4.6.0.214.6.0.21
WSO2 WSO2 Traffic Managerfrom 4.5.0, before 4.5.0.564.5.0.56
WSO2 WSO2 Traffic Managerfrom 4.6.0, before 4.6.0.214.6.0.21
WSO2 WSO2 API Control Planefrom 4.5.0, before 4.5.0.584.5.0.58
WSO2 WSO2 API Control Planefrom 4.6.0, before 4.6.0.224.6.0.22
WSO2 WSO2 API Managerfrom 4.1.0, before 4.1.0.2574.1.0.257
WSO2 WSO2 API Managerfrom 4.2.0, before 4.2.0.1974.2.0.197
WSO2 WSO2 API Managerfrom 4.3.0, before 4.3.0.1084.3.0.108
WSO2 WSO2 API Managerfrom 4.4.0, before 4.4.0.724.4.0.72
WSO2 WSO2 API Managerfrom 4.5.0, before 4.5.0.574.5.0.57
WSO2 WSO2 API Managerfrom 4.6.0, before 4.6.0.214.6.0.21
WSO2 WSO2 Carbon API Manager Rest API Utilityfrom 9.20.74, before 9.20.74.4019.20.74.401
WSO2 WSO2 Carbon API Manager Rest API Utilityfrom 9.28.116, before 9.28.116.4179.28.116.417
WSO2 WSO2 Carbon API Manager Rest API Utilityfrom 9.29.120, before 9.29.120.2369.29.120.236
WSO2 WSO2 Carbon API Manager Rest API Utilityfrom 9.30.67, before 9.30.67.1679.30.67.167
WSO2 WSO2 Carbon API Manager Rest API Utilityfrom 9.31.86, before 9.31.86.1589.31.86.158
WSO2 WSO2 Carbon API Manager Rest API Utilityfrom 9.32.147, before 9.32.147.599.32.147.59

Exploitation

In CISA KEV since24 Sep 2026
Due date for US federal agencies27 Sep 2026
Used in ransomware campaignsUnknown
Required actionApply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.

Severity

CVSS 3.110 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Scored by the CNA (ed10eef1-636d-4fbe-9993-6890dfa878f8)
WeaknessCWE-347

References

Sources

Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.

This product uses data from the NVD API but is not endorsed or certified by the NVD.