Reported

May 22, 2025

Issued

May 22, 2025

Package

pingora-core (crates.io)

Type

Vulnerability

Keywords

#request-smuggling #cache-poisoning

Aliases

• CVE-2025-4366

References

• https://blog.cloudflare.com/resolving-a-request-smuggling-vulnerability-in-pingora/

Patched

• >=0.5.0

Description

Pingora versions prior to 0.5.0 which used the caching functionality in pingora-proxy did not properly drain the downstream request body on cache hits.

This allows an attacker to craft malicious HTTP/1.1 requests which could lead to request smuggling or cache poisoning.

This flaw was corrected in commit fda3317ec822678564d641e7cf1c9b77ee3759ff by ensuring that the downstream request body is always drained before a connection can be reused.

See the blog post for more information.

Advisory available under CC0-1.0 license.