CVE-2025-4366

Request Smuggling Vulnerability in Pingora

Description

A request smuggling vulnerability identified within Pingora’s proxying framework, pingora-proxy, allows malicious HTTP requests to be injected via manipulated request bodies on cache HITs, leading to unauthorized request execution and potential cache poisoning. Fixed in:  https://github.com/cloudflare/pingora/commit/fda3317ec822678564d641e7cf1c9b77ee3759ff https://github.com/cloudflare/pingora/commit/fda3317ec822678564d641e7cf1c9b77ee3759ff Impact: The issue could lead to request smuggling in cases where Pingora’s proxying framework, pingora-proxy, is used for caching allowing an attacker to manipulate headers and URLs in subsequent requests made on the same HTTP/1.1 connection.

Category

7.4
CVSS
Severity: High
CVSS 4.0 •
EPSS 0.04%
Published at:
Updated at:

References

Frequently Asked Questions

What is the severity of CVE-2025-4366?
CVE-2025-4366 has been scored as a high severity vulnerability.
How to fix CVE-2025-4366?
To fix CVE-2025-4366, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2025-4366 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2025-4366 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2025-4366?
CVE-2025-4366 affects .
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