CVE-2025-4366 is a request smuggling vulnerability in Cloudflare’s Pingora proxying framework, specifically within pingora-proxy, when used for caching. This flaw allows attackers to inject malicious HTTP requests by manipulating request bodies on cache hits, potentially leading to unauthorized request execution and cache poisoning. With a CVSS score of 6.1 (Medium), this vulnerability has a network attack vector and low attack complexity, but requires user interaction (UI:R) to exploit, resulting in partial confidentiality and integrity impacts (C:L/I:L). Currently, there is no evidence of active exploitation, publicly available exploit code, or significant community discussion surrounding this CVE.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
< 0.5.0CPE matchmatch criteria | cpe:2.3:a:cloudflare:pingora:*:*:*:*:*:*:*:* |
CVSS version used by this source: 4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.