Vulnerability · Published Aug 5, 2026 · Assigned by Kong
CVE-2026-17578Kong Event Gateway AES-GCM nonce reuse due to missing key rotation enforcement
Low 2.3
In plain English
A low-severity security flaw in Kong Event Gateway from Kong. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Official description
Kong Event Gateway versions 1.0.0 through 1.1.1 and 1.2.0 do not enforce key rotation before reaching NIST SP 800-38D recommended usage limit for AES-GCM encryption keys with random nonces when the AWS IAM encryption feature is enabled. If a producer sends messages at a sustained high rate without key rotation, which only occurs on reboot of the Kong Event Gateway instance, the probability of a nonce collision becomes non-negligible. An authorized consumer who detects a nonce collision can recover parts of plaintext from the affected messages. New versions 1.1.2 and 1.2.1 enforce automatic key rotation before the recommended usage limit is reached.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kong | Kong Event Gateway | 1.0.0 – before 1.1.21.2.0 – before 1.2.1 |
Weakness: CWE-323 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/AU:N/R:U/U:Amber
References
- https://developer.konghq.com/event-gateway/changelog/ release-notes