Predictable Pseudorandom Number Generation via Webhook HMAC Secret Generation in Multiple WSO2 Products Allows Forged Event Payloads
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| WSO2 | WSO2 API Manager | unaffected |
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| WSO2 | WSO2 API Control Plane | unaffected |
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Configuration 1 [-]
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No data.
| Vendor | Product | Versions | ||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Wso2 | Wso2 Api Control Plane |
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| Wso2 | Wso2 Api Manager |
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Vendor Solution
Follow the instructions given on https://security.docs.wso2.com/en/latest/security-announcements/security-advisories/2026/WSO2-2026-5174/#solution
No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.358% probability within 30 days)
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Wso2 api Control Plane
Wso2 api Manager |
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| CPEs | cpe:2.3:a:wso2:api_control_plane:*:*:*:*:*:*:*:* cpe:2.3:a:wso2:api_manager:*:*:*:*:*:*:*:* |
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| Vendors & Products |
Wso2 api Control Plane
Wso2 api Manager |
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
ssvc
|
| Type | Values Removed | Values Added |
|---|---|---|
| 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. | |
| Title | Predictable Pseudorandom Number Generation via Webhook HMAC Secret Generation in Multiple WSO2 Products Allows Forged Event Payloads | |
| First Time appeared |
Wso2
Wso2 wso2 Api Control Plane Wso2 wso2 Api Manager |
|
| Weaknesses | CWE-330 | |
| CPEs | cpe:2.3:a:wso2:wso2_api_control_plane:*:*:*:*:*:*:*:* cpe:2.3:a:wso2:wso2_api_manager:*:*:*:*:*:*:*:* |
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| Vendors & Products |
Wso2
Wso2 wso2 Api Control Plane Wso2 wso2 Api Manager |
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| References |
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| Metrics |
cvssV3_1
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