Cyber Resilience

CVE-2026-4249

Wso2 Api Manager 4.0.0 – 4.0.0.390

Published
06 July 2026
Modified
09 July 2026
Patch / advisory
View advisory
CVSS Score v3.1 8.6
Click a component to see what it means
Raw vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS Score 0.0034 27th percentile
Risk Priority 61 floored blend · peak EPSS

Summary

CVE-2026-4249 is a high-severity Improper Neutralization (CWE-707) vulnerability in Wso2 Api Manager. Its CVSS base score is 8.6 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 27th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified map to SA-11 (Developer Testing and Evaluation) and SI-10 (Information Input Validation) — see the control section below for these in your framework.

EU & UK References

Vulnerability Data

The throttling event handling mechanism in multiple WSO2 products accepts user-supplied JSON payloads without sufficient validation of their structure and content. This allows an unauthenticated remote attacker to inject malicious JSON data that can lead to a persistent denial of…

more

service condition. Successful exploitation of this vulnerability can disrupt the API Gateway, preventing legitimate API traffic from being processed and impacting complete service availability. The denial of service is persistent, requiring manual intervention to restore normal operations.

CWE(s)
CWE-707

Related Threats

MITRE ATT&CK Enterprise Techniques

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1059 Command and Scripting Interpreter Execution
Adversaries may abuse command and script interpreters to execute commands, scripts, or binaries.
attack.mitre.org →
T1203 Exploitation for Client Execution Execution
Adversaries may exploit software vulnerabilities in client applications to execute code.
attack.mitre.org →
T1212 Exploitation for Credential Access Credential Access
Adversaries may exploit software vulnerabilities in an attempt to collect credentials.
attack.mitre.org →
Derived from this CVE’s CWE(s) via the direct CWE→ATT&CK cross-walk.

CVEs Like This One

CVE-2025-8154Same product: Wso2 Api Control Plane
CVE-2025-13590Same product: Wso2 Api Control Plane
CVE-2025-4760Same product: Wso2 Api Control Plane
CVE-2026-1728Same product: Wso2 Api Control Plane
CVE-2026-5430Same product: Wso2 Api Control Plane
CVE-2025-8325Same product: Wso2 Api Control Plane
CVE-2025-11093Same product: Wso2 Api Control Plane
CVE-2025-5717Same product: Wso2 Api Control Plane
CVE-2025-3125Same product: Wso2 Api Control Plane
CVE-2025-9152Same product: Wso2 Api Control Plane

Affected Assets

wso2
api control plane
4.5.0 — 4.5.0.55 · 4.6.0 — 4.6.0.19
wso2
api manager
4.0.0 — 4.0.0.390 · 4.1.0 — 4.1.0.254 · 4.2.0 — 4.2.0.194
wso2
traffic manager
4.5.0 — 4.5.0.53 · 4.6.0 — 4.6.0.18
wso2
universal gateway
4.5.0 — 4.5.0.54 · 4.6.0 — 4.6.0.18

Mitigating Controls

Control response

Prevent
Stop it (NIST 800-53)

—

Detect
Catch it (NIST detect / respond)

—

Harden
Shrink the surface (DISA STIG)
  • 6 hardening rules · 4 OS baselines
Validate
Prove the fix (OWASP ASVS)
  • V1.3.9

Mitigating Controls (NIST 800-53 r5) AI

SA-11 Developer Testing and Evaluation good match

Developer testing can discover missing or incorrect neutralization logic.

SI-10 Information Input Validation good match

Input validation directly enforces well-formed data and security properties before processing.

SI-15 Information Output Filtering good match

Output filtering enforces neutralization properties on data leaving the system.

Mitigating Controls (NIST CSF 2.0) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.

PR.PS-06 mostly match
prevents

Secure SDLC practices directly require input/output neutralization and validation to prevent malformed data handling.

Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI

Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.

A.8.28 Secure coding mostly match
prevents

Secure coding standards directly require proper neutralization of inputs and outputs, eliminating CWE-707.

A.8.29 Security testing in development and acceptance mostly match
finds

Security testing can detect neutralization flaws but does not itself implement the required controls.

A.8.25 Secure development life cycle partial match
prevents

Secure development life cycle mandates input validation and output encoding that directly prevent improper neutralization.

A.8.26 Application security requirements partial match
prevents

Application security requirements explicitly call for data validation and sanitization controls addressing neutralization weaknesses.

A.8.27 Secure system architecture and engineering principles partial match
prevents

Secure architecture principles include canonicalization and safe parsing, mitigating but not fully covering neutralization issues.

Hardening callouts derived

Configuration rules from DISA STIG baselines that bear on weaknesses of the type cited by this CVE. Each rule is shown with the relationship its mapping actually records, against the CWE it was authored against. Derived via CVE→CWE over `controls_xwalks` (authoritative rows only; rows rated `none` are excluded).

Oracle Linux 9 (1 rule)
  • V-271523 OL 9 must check the GPG signature of locally installed software packages before installation. prevents CWE-707

References