Vulnerability

CVE-2026-5430

Critical· 10.0KEVCVSS10EPSS1%

.rules3/5

WSO2 Multiple Products Path Traversal Vulnerability

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.

Threat signal

100/100

Severe

Severity

critical

CVSS

10.0

EPSS

Active

KEV

CISA KEV — actively exploited

25d overdue

AffectedWSO2 — Multiple Products

Added to KEV

2026-09-24

Federal patch due (BOD 22-01)

2026-09-27

Required action (CISA verbatim)

Apply 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.

Vendor advisory + references

CISA description: “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. ”

CVSS

v3.1via NVDOpen in FIRST calculator →

10.0/ 10CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Attack VectorNetworkExploitable remotely over the internet — no local access needed.
Attack ComplexityLowNo special conditions — exploit works reliably.
Privileges RequiredNoneUnauthenticated — no credentials needed.
User InteractionNoneFully automated — no victim action needed.
ScopeChangedImpact extends beyond the vulnerable component (e.g. sandbox escape).
Confidentiality ImpactHighTotal disclosure of sensitive data.
Integrity ImpactHighTotal compromise of integrity — full data modification possible.
Availability ImpactHighTotal loss of availability — full DoS possible.

EPSS

Exploit prediction · 30-day horizonFIRST.org →

0.59%

probability of exploitation in next 30 days

p47

higher than 47% of all CVEs

9-day trend↑ 0pp

Low exploitation likelihood — defer if no other signals fire.

Vendor VEX

No VEX statements published for CVE-2026-5430. Vendors publish VEX (Vulnerability Exploitability eXchange) to assert per-product whether a CVE is actually exploitable in their distribution.

SSVCAct

Active exploitation with total impact on essential/support systems

exploitation: active
automatable: yes
impact: total
mission: support

Lifecycle

2026-09-24Added to CISA KEVransomware: Unknown
2026-09-24Published
2026-09-24Last modified2 sources
2026-09-27Federal patch due (BOD 22-01)