- 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.
- Source
- cna@cloudflare.com
- NVD status
- Awaiting Analysis
CVSS 4.0
- Type
- Secondary
- Base score
- 7.4
- Impact score
- -
- Exploitability score
- -
- Vector string
- 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
- Severity
- HIGH
- cna@cloudflare.com
- CWE-444
- Hype score
- Not currently trending
Cloudflare has alerted users of a security vulnerability—tracked as CVE-2025-4366—in the widely used Pingora OSS framework. This vulnerability, a request smuggling flaw, was discovered by a security researcher while testing exploits against Cloudflare’s Content Delivery
@cybertzar
27 May 2025
50 Impressions
0 Retweets
1 Like
0 Bookmarks
0 Replies
0 Quotes
Cloudflare has patched a request smuggling flaw (CVE-2025-4366) in Pingora's caching system, which could let attackers inject malicious requests and expose visitor URLs 🌐. Quick fix underway. #PingoraOSS #RequestSmuggling #UK https://t.co/4fkaF75OEe
@TweetThreatNews
23 May 2025
4 Impressions
0 Retweets
0 Likes
0 Bookmarks
0 Replies
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Cloudflare patched a vulnerability (CVE-2025-4366) in the Pingora OSS framework, which exposed users of the framework and Cloudflare CDN’s free tier to potential request smuggling attacks. https://t.co/WhBtDnFjP3
@Cloudflare
22 May 2025
4238 Impressions
3 Retweets
35 Likes
1 Bookmark
0 Replies
0 Quotes