AIKIDO-2026-11046
pingora is vulnerable to Resource Exhaustion
75
High Risk
This Affects:
pingoraTL;DR
Cloudflare Pingora HTTP/2 handling is vulnerable to an HPACK indexed-reference header bomb combined with response flow-control stalling. A client can send many cheap header references and keep the server from freeing per-request allocations. Affected servers can suffer remote memory exhaustion and availability loss through HTTP/2 traffic. Version 0.8.1 bounds default HTTP/2 server limits to mitigate memory exhaustion.
Who does this affect?
You are affected if you are using a version that falls within the vulnerable range and HTTP/2 is enabled.
Background info
pingora is vulnerable to Resource Exhaustion in versions 0.0.1 - 0.8.0.
How to fix this
Upgrade the pingora library to the patch version.
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