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CVE-2026-3416

5.9 · MEDIUM

The API Publisher component previously used a non-cryptographic pseudorandom number generator (PRNG) to create shared secrets for Webhook HMAC validation.

Published Sep 3, 2026wso2CWE-330EPSS 0.36%

Overview

CVE-2026-3416 is a medium-severity vulnerability affecting wso2 api_control_plane. It was published on September 3, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

The API Publisher component previously used a non-cryptographic pseudorandom number generator (PRNG) to create shared secrets for Webhook HMAC validation. This PRNG lacks sufficient entropy for security-sensitive operations, allowing a sophisticated attacker to predict future secrets. This enables malicious actors to forge event payloads with valid HMAC signatures, bypassing the API Gateway's authenticity verification.

Successful exploitation could allow an attacker to predict shared secrets used for Webhook HMAC validation and forge event payloads with valid signatures. This may enable bypassing API Gateway authenticity checks, leading to unauthorized event injection, data manipulation, or downstream system compromise.

Remediation

Check the references section for vendor advisories and patches from wso2. Update api_control_plane to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
wso2api_control_plane>= 4.5.0, < 4.5.0.53Affected
wso2api_manager>= 4.1.0, < 4.1.0.253Affected

References

Refsecurity.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5174/

How CyberStrike helps

Frequently asked questions

What is CVE-2026-3416?

CVE-2026-3416 is a medium-severity vulnerability affecting wso2 api_control_plane. It was published on September 3, 2026 and has a CVSS 3.1 base score of 5.9 (MEDIUM).

How severe is CVE-2026-3416?

This vulnerability has a CVSS 3.1 base score of 5.9, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-3416?

Check the references section for vendor advisories and patches from wso2. Update api_control_plane to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-3416?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-3416 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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