CVE-2026-4249

Q: How do I fix CVE-2026-4249?

Published advisories record a fix for 4 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Q: Is CVE-2026-4249 being actively exploited?

Not that we know of. CVE-2026-4249 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.56% is the estimated probability that it will be exploited in the next 30 days. That is higher than 44% of all scored CVEs.

Q: How severe is CVE-2026-4249?

CVE-2026-4249 has a CVSS v3 base score of 8.6, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

Q: What does CVE-2026-4249 affect?

Published advisories record a fix for api control plane (NVD), api manager (NVD), traffic manager (NVD), universal gateway (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

HIGH

8.6

CVSS v3

NVD

Description

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 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-707

How to fix

Remediation Available

api control planeNVD

Affected:>= 4.6.0, < 4.6.0.19Fixed in:4.6.0.19CVE-2026-4249derived from NVD

Affected:>= 4.5.0, < 4.5.0.55Fixed in:4.5.0.55CVE-2026-4249derived from NVD

api managerNVD

Affected:>= 4.5.0, < 4.5.0.54Fixed in:4.5.0.54CVE-2026-4249derived from NVD

Affected:>= 4.4.0, < 4.4.0.69Fixed in:4.4.0.69CVE-2026-4249derived from NVD

Affected:>= 4.3.0, < 4.3.0.105Fixed in:4.3.0.105CVE-2026-4249derived from NVD

Affected:>= 4.2.0, < 4.2.0.194Fixed in:4.2.0.194CVE-2026-4249derived from NVD

Affected:>= 4.0.0, < 4.0.0.390Fixed in:4.0.0.390CVE-2026-4249derived from NVD

Affected:>= 4.6.0, < 4.6.0.18Fixed in:4.6.0.18CVE-2026-4249derived from NVD

Affected:>= 4.1.0, < 4.1.0.254Fixed in:4.1.0.254CVE-2026-4249derived from NVD

traffic managerNVD

Affected:>= 4.5.0, < 4.5.0.53Fixed in:4.5.0.53CVE-2026-4249derived from NVD

Affected:>= 4.6.0, < 4.6.0.18Fixed in:4.6.0.18CVE-2026-4249derived from NVD

universal gatewayNVD

Affected:>= 4.6.0, < 4.6.0.18Fixed in:4.6.0.18CVE-2026-4249derived from NVD

Affected:>= 4.5.0, < 4.5.0.54Fixed in:4.5.0.54CVE-2026-4249derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionNone

ScopeChanged

Impact

ConfidentialityNone

IntegrityNone

AvailabilityHigh

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

Exploit Intelligence

0.56%probability of exploitation in 30 days

44thpercentile

Moderate risk: more likely to be exploited than 44% of all known CVEs.

References

Vendor Advisory1

security.docs.wso2.com

Related Vulnerabilities

Other CWE-707 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-10914	High	8.1	96%	-	-
CVE-2024-10915	High	8.1	79%	-	-
CVE-2024-43572	High	7.8	67%	KEV	Fix
CVE-2022-4257	Medium	6.3	44%	-	-
CVE-2025-26633	High	7.0	30%	KEV + Ransom	Fix
CVE-2022-3801	Medium	6.3	30%	-	-

Common questions

How do I fix CVE-2026-4249?

Published advisories record a fix for 4 affected products. The "How to fix" section on this page lists the fixed version and source advisory for each one, so apply the entry matching what you actually run.

Is CVE-2026-4249 being actively exploited?

Not that we know of. CVE-2026-4249 is not in the CISA Known Exploited Vulnerabilities catalog. Its EPSS score of 0.56% is the estimated probability that it will be exploited in the next 30 days. That is higher than 44% of all scored CVEs.

How severe is CVE-2026-4249?

CVE-2026-4249 has a CVSS v3 base score of 8.6, rated high. CVSS rates the technical impact if the vulnerability is exploited, not how likely that is, so weigh it alongside the exploit-prediction score when you decide what to patch first.

What does CVE-2026-4249 affect?

Published advisories record a fix for api control plane (NVD), api manager (NVD), traffic manager (NVD), universal gateway (NVD). Only products with a sourced advisory are listed, so treat this as what we can cite rather than a complete inventory.

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-07-09.