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CVE-2026-78669 A malicious HTTP/2 peer can cause excessive CPU consumption in the client or server by opening a large number of streams…

Description

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.

Affected products and versions

Product Affected versions Fixed in
net/http 1.26 earliest → < 1.26.9 1.26.9
net/http/internal/http2 1.27 1.27.0-0 → < 1.27.2 1.27.2
golang.org/x/net/http2 0.60 earliest → < 0.60.0 0.60.0

References

Timeline

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The 26 CVEs of net/http →
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