CVE-2026-33814
HighCVSS 7.5Exploitation Probability (EPSS)
Elevated risk54th percentile - higher than 54% of all known CVEs
Summary
When processing HTTP/2 SETTINGS frames, the transport enters an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.
Risk Assessment
The risk for the organization is the possibility of a DoS attack through network and CPU resource exhaustion, which could lead to unavailability of HTTP/2 services.
Recommendation
It is recommended to update the HTTP/2 server to a version that correctly handles a value of 0 in SETTINGS_MAX_FRAME_SIZE, and implement limits on the number of frames.
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Original NVD description (English source)
When processing HTTP/2 SETTINGS frames, transport will enter an infinite loop of writing CONTINUATION frames if it receives a SETTINGS_MAX_FRAME_SIZE with a value of 0.