MinorCritical vulnerability

CVE-2026-78669 (CVSS 7.5)

NVD · officialPublished Oct 8, 2026Risk 23/100EPSS 0.2%

A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams and then sending many small SETTINGS frames containing SETTINGS_INITIAL_WINDOW_SIZE values.

Technical details

CVSS

7.5

AV:NetworkAC:LowPR:NoneUI:NoneC:NoneI:NoneA:High

Evidence and sources

This record is attributed to NVD. Exploitation status and remediation guidance are kept separate from the vulnerability's technical severity.

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