All news with #cloudflare tag

🚀 Cloudflare has significantly upgraded Python Workers to support any package compatible with Pyodide, delivering a more complete Python-native developer experience. Rather than shipping a limited set of built-ins, developers can install pure-Python and many dynamic-library packages using the integrated uv tooling and pywrangler. Cloudflare also uses dedicated memory snapshots and its isolate-based architecture to achieve markedly faster cold starts than competing serverless options while keeping easy, global deployment and free-tier options.

🔧 Cloudflare says an emergency patch to mitigate the critical React2Shell vulnerability (CVE-2025-55182) introduced a change to its Web Application Firewall request parsing that briefly rendered the network unavailable and caused global "500 Internal Server Error" responses. The update targeted active remote code execution attempts against React Server Components and dependent frameworks. Cloudflare emphasized the incident was not an attack and that the change was deployed to protect customers while the industry addresses the flaw.

🛡️ Cloudflare briefly disrupted service after a Web Application Firewall update intended to mitigate a vulnerability in React Server Components (CVE-2025-55182) caused its request parser to fail. The incident began at 09:09 UTC and a corrective change was deployed within ten minutes, but monitoring sites and customers reported widespread errors during the outage. Downdetector logged spikes for enterprise and consumer services including Shopify, Zoom, Claude AI, and AWS. Cloudflare said the change was a protective measure for unpatched customers and confirmed the disruption was not an attack.

🚨 Cloudflare is experiencing an outage that is causing many websites to return an 500 Internal Server Error. The fault appears to be server-side and affects requests routed through Cloudflare, so users see an error page instead of normal content. Engineers at the provider are investigating the root cause and working to restore normal operations. This remains a developing situation and impacted sites may be unavailable until services are recovered.

🔍 SANS honeypots detected increased HTTP requests containing CDN-related headers that may indicate probing to evade CDN protections. Researchers observed headers referencing Cloudflare (Cf-Warp-Tag-Id), Fastly (X-Fastly-Request-Id), Akamai (X-Akamai-Transformed) and an anomalous X-T0Ken-Inf0. Experts warn this could be reconnaissance to bypass CDNs and reach origin servers and urge origin hardening such as IP allowlists, validated tokens, or private connectivity.

⚠️ On December 5, 2025 a configuration change to Cloudflare’s Web Application Firewall (WAF) triggered an error in a subset of proxies, causing HTTP 500 responses for affected customers. The change — increasing WAF request-body buffering to mitigate CVE-2025-55182 — was rolled out gradually, but a separate global configuration update disabled an internal tool and propagated immediately. That global change caused a Lua runtime nil lookup in the older FL1 proxy when a killswitch skipped an execute action in a ruleset; the change was reverted within 25 minutes and the incident was not caused by malicious activity.

🚨 Cloudflare reported it detected and mitigated a record 29.7 Tbps distributed denial-of-service attack attributed to the AISURU botnet. The UDP "carpet-bombing" assault, which randomized packet attributes and targeted an average of 15,000 destination ports per second, lasted 69 seconds. Cloudflare also mitigated a 14.1 Bpps event and said AISURU may comprise 1–4 million infected hosts, while blocking thousands of related hyper-volumetric attacks and noting significant quarterly increases in DDoS activity.

⚠️ In three months the Aisuru botnet has been linked to more than 1,300 DDoS attacks, including a record peak of 29.7 Tbps in Q3 2025 that Cloudflare mitigated. The botnet, offered as a rental service, leverages an estimated 1–4 million compromised routers and IoT devices exploited via known vulnerabilities and weak credentials. The record incident lasted 69 seconds and used UDP carpet‑bombing across roughly 15,000 destination ports per second; Cloudflare reports a sharp rise in hyper‑volumetric attacks that can disrupt ISPs and critical services.

📈 The 23rd edition of Cloudflare’s Quarterly DDoS Threat Report reviews Q3 2025 data and spotlights the unprecedented Aisuru botnet, estimated at 1–4 million infected hosts. Aisuru launched routine hyper-volumetric attacks exceeding 1 Tbps and 1 Bpps, peaking at 29.7 Tbps and 14.1 Bpps, while Cloudflare mitigated 8.3 million DDoS events in the quarter. Network-layer attacks dominated the mix, and the report warns that short, high-volume strikes often outpace manual defenses, underscoring the need for global, automated mitigation.

🛡️ Cloudflare has deployed new WAF protections to mitigate a high‑severity RCE in React Server Components (CVE-2025-55182). All customers whose React traffic is proxied through the Cloudflare WAF are automatically protected — the rules are included in both the Free Managed Ruleset and the standard Managed Ruleset and default to Block. Rule IDs: Managed Ruleset 33aa8a8a948b48b28d40450c5fb92fba and Free Ruleset 2b5d06e34a814a889bee9a0699702280; Cloudflare Workers are immune. Customers on paid plans should verify Managed Rules are enabled and update to React 19.2.1 and the recommended Next.js releases (16.0.7, 15.5.7, 15.4.8).

🚀 Replicate is now part of Cloudflare, bringing its model packaging and serving tools into Cloudflare’s global network. Since 2019 Replicate has shipped Cog and a hosted inference platform that made running research models accessible and scaled during the Stable Diffusion surge. Joining Cloudflare pairs those abstractions with network primitives like Workers, R2, and Durable Objects to enable edge model execution, instant serverless pipelines, and streaming integrations such as WebRTC while supporting developers and researchers.

🖼️ Cloudflare now hosts Black Forest Lab's FLUX.2 image model on the Workers AI inference platform. The licensed dev release builds on the popular FLUX.1 lineage with stronger physical-world grounding, improved fidelity for faces, hands and small objects, and advanced multi-reference editing to preserve character and product consistency. Workers AI exposes FLUX.2 via multipart form-data (up to four 512×512 inputs) and returns images up to 4 megapixels, while supporting JSON prompting, hex color controls, multilingual prompts, and a server-side binding for integration into production pipelines.

🔍 Cloudflare describes enhancements to its Web Application Firewall (WAF) payload logging, which now records specific request fields and post-transformation values that triggered a rule. The feature disambiguates which branch of a rule evaluated true, logs partial matches with contextual slices, and reduces the amount of data written for large fields. Cloudflare also optimized regex compilation and memory usage, shrank median log sizes, and plans further work on binary formats and expanded WAF coverage.

🔍 An intermittent outage at Cloudflare on Nov. 18 briefly disrupted many major websites and forced some customers to pivot DNS and routing to preserve availability. Those provisional workarounds may have exposed origin infrastructure by bypassing edge protections such as WAFs and bot management. Security teams should review OWASP-related logs, emergency DNS changes, and any ad hoc services or devices introduced during the outage. The incident underscores single-vendor risk and the need for formal fallback plans.

⚠️ Cloudflare suffered its worst outage in six years after a database permissions change caused its Bot Management system to generate an oversized configuration feature file containing duplicate entries. The file exceeded a hardcoded 200-feature limit, triggering a Rust panic that crashed core proxy software and produced widespread 5xx errors. Engineers restored service by replacing the problematic file, and full recovery was achieved several hours later.

⚠️ Cloudflare is investigating an outage that has produced widespread 500 internal server errors and impacted its Dashboard and API, disrupting access to numerous customer websites and platforms. The company first reported support portal availability issues and then an incident at 11:48 UTC affecting the Cloudflare Global Network, with multiple European nodes observed offline. Downdetector logged tens of thousands of reports, and Cloudflare says it is working to mitigate the incident; partial recovery has been reported for Access and WARP while remediation continues for application services.

⚠️ On 18 November 2025, Cloudflare experienced a major outage after a permissions change in a ClickHouse database caused duplicated metadata to be emitted into a Bot Management feature file, doubling its size. The oversized file exceeded a preallocated feature limit in the core proxy, triggering a Rust panic and widespread HTTP 5xx errors. Cloudflare halted propagation, restored a known-good file, and restarted the proxy; services were largely restored by 14:30 UTC and fully recovered by 17:06 UTC. The company apologized and pledged architectural and process hardening to prevent recurrence.

🧭 Cloudflare is bringing Replicate into its developer platform to integrate Replicate’s large model catalog and community with Cloudflare’s global, serverless inference stack. Existing Replicate APIs and workflows will continue to operate without interruption while benefitting from Cloudflare’s performance and reliability. Workers AI users will get immediate access to a greatly expanded catalog plus upcoming support for fine-tuning and custom models, enabled by Cog and unified control through Cloudflare’s AI Gateway.

🚀 Cloudflare has made remote bindings generally available, letting local Workers connect to live resources such as R2 buckets, D1 and KV namespaces without deploying. Developers can enable a binding with "remote: true" in Wrangler v4.37.0 and use existing Wrangler OAuth credentials to access production data. The local workerd runtime proxies JS API calls to remote service bindings (including JSRPC via Cap’n Web websockets), and tooling like the Vite plugin and vitest-pool-workers can use utilities such as startRemoteProxySession to join remote sessions.

🐍 Cloudflare has announced Python Workflows in beta, enabling developers to orchestrate multi-step, durable applications on Workers using Python. The feature aims for feature parity with the existing JavaScript SDK while adapting APIs to Pythonic idioms—using decorators for step callbacks and snake_case naming for method calls. Under the hood it leverages Pyodide and CPython in the runtime, exposes WorkflowStep as an RPC-backed JsProxy for at-most-once durable execution, and supports DAG-style concurrency via asyncio.gather. Targeted use cases include data pipelines, ML/LLM training loops, and autonomous agents where step-level retries, state persistence, and explicit wait points simplify orchestration.