CVE-2026-3416
MediumCVSS 5.9Exploitation Probability (EPSS)
Low risk18th percentile - higher than 18% of all known CVEs
Summary
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.
Risk Assessment
An attacker can predict HMAC secrets and inject forged events, potentially leading to unauthorized data manipulation or compromise of downstream systems.
Recommendation
Update the API Publisher component to a version using a cryptographically secure random number generator and enforce rotation of webhook secrets.
Other vulnerabilities in API Publisher
Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS