CVE-2025-4820 Incorrect congestion window growth by optimistic ACK

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4820

CVE-2025-4020 (CVE-2025-4820) affects the Cloudflare quiche library. The issue is an incorrect congestion window growth caused by an opportunistic ACK attack (RFC 9000, §21.4) that can allow a victim to send more data in flight than the path supports. An unauthenticated remote attacker can comple...

CVE-2025-4820 Incorrect congestion window growth by optimistic ACK

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

CVE-2025-4820 Incorrect congestion window growth by optimistic ACK

Impact Cloudflare quiche was discovered to be vulnerable to incorrect congestion window growth, which could cause it to send data at a rate faster than the path might actually support. An unauthenticated remote attacker can exploit the vulnerability by first completing a handshake and initiating ...

New Malware Campaign Uses Cloudflare Tunnels to Deliver RATs via Phishing Chains

A new campaign is making use of Cloudflare Tunnel subdomains to host malicious payloads and deliver them via malicious attachments embedded in phishing emails. The ongoing campaign has been codenamed SERPENTINECLOUD by Securonix. It leverages "the Cloudflare Tunnel infrastructure and Python-based...

quiche 安全漏洞

quiche is a Cloudflare open source implementation of the IETF-designated QUIC transport protocol and HTTP/3. A security vulnerability exists in quiche that stems from an improperly growing congestion window that could cause data to be sent at a rate that exceeds the path support capability...

@basemachina/ai-csv-editor (>=0.1.0 <=0.2.1), @ecomiq/storefront (>=0.1.0 <=1.0.1) +14 more potentially affected by CVE-2025-6087 +1 more via @opennextjs/cloudflare (>=1.0.1 <=1.19.7)

@opennextjs/cloudflare NPM version =1.0.1, =0.1.0, =0.1.0, =0.1.0, =0.1.0, =0.1.0, =0.0.694, =0.0.1, =0.0.6 - next-ai-draw-io =0.4.10 - opennext-oss-provider =0.0.1 and more Source cves: CVE-2025-6087, CVE-2026-3125 Source advisory: OSV:GHSA-RVPW-P7VW-WJ3M...

GHSA-RVPW-P7VW-WJ3M OpenNext for Cloudflare (opennextjs-cloudflare) has a SSRF vulnerability via /_next/image endpoint

A Server-Side Request Forgery SSRF vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an unimplemented feature in the Cloudflare adapter for Open Next, which allowed unauthenticated users to proxy arbitrary remote content via the /next/image endpoint...

CVE-2025-6087

A Server-Side Request Forgery SSRF vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an unimplemented feature in the Cloudflare adapter for Open Next, which allowed unauthenticated users to proxy arbitrary remote content via the /next/image endpoint...

CVE-2025-6087 SSRF vulnerability in opennextjs-cloudflare via /_next/image endpoint

A Server-Side Request Forgery SSRF vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an unimplemented feature in the Cloudflare adapter for Open Next, which allowed unauthenticated users to proxy arbitrary remote content via the /next/image endpoint...

CVE-2025-6087

CVE-2025-6087 affects @opennextjs/cloudflare (OpenNext Cloudflare adapter) and enables SSRF by proxying arbitrary remote content through the /_next/image endpoint due to an unimplemented feature. Affected deployments using the Cloudflare adapter for Open Next are at risk of loading remote resourc...

CVE-2025-6087 SSRF vulnerability in opennextjs-cloudflare via /_next/image endpoint

A Server-Side Request Forgery SSRF vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an unimplemented feature in the Cloudflare adapter for Open Next, which allowed unauthenticated users to proxy arbitrary remote content via the /next/image endpoint...

CVE-2025-6087 SSRF vulnerability in opennextjs-cloudflare via /_next/image endpoint

A Server-Side Request Forgery SSRF vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an unimplemented feature in the Cloudflare adapter for Open Next, which allowed unauthenticated users to proxy arbitrary remote content via the /next/image endpoint...

OpenNext opennextjs/cloudflare 安全漏洞

OpenNext opennextjs/cloudflare is an OpenNext open source Next.js adapter. A security vulnerability exists in OpenNext opennextjs/cloudflare that stems from a server-side request forgery issue that could result in loading arbitrary remote content...

PT-2025-25581

Name of the Vulnerable Software and Affected Versions @opennextjs/cloudflare versions prior to 1.3.0 create-cloudflare versions prior to 2.49.3 Description A Server-Side Request Forgery SSRF vulnerability was identified in the @opennextjs/cloudflare package. The vulnerability stems from an...

Low-order Point Validation Failure

github.com/cloudflare/circl is vulnerable to low-order point validation failure. The vulnerability is due to the failure to validate user-supplied low-order points during the Diffie-Hellman key exchange, which can allow attackers to force the identity point and compromise session security...

CVE-2025-0651

Improper Privilege Management vulnerability in Cloudflare WARP on Windows allows File Manipulation. User with a low system privileges can create a set of symlinks inside the C:\ProgramData\Cloudflare\warp-diag-partials folder. After triggering the 'Reset all settings" option the WARP service will...

CVE-2023-6992

Cloudflare version of zlib library was found to be vulnerable to memory corruption issues affecting the deflation algorithm implementation deflate.c. The issues resulted from improper input validation and heap-based buffer overflow. A local attacker could exploit the problem during compression...

CVE-2023-1862

Cloudflare WARP client for Windows up to v2023.3.381.0 allowed a malicious actor to remotely access the warp-svc.exe binary due to an insufficient access control policy on an IPC Named Pipe. This would have enabled an attacker to trigger WARP connect and disconnect commands, as well as obtaining...

CVE-2023-1412

An unprivileged non-admin user can exploit an Improper Access Control vulnerability in the Cloudflare WARP Client for Windows = 2022.12.582.0 to perform privileged operations with SYSTEM context by working with a combination of opportunistic locks oplock and symbolic links which can both be creat...