DeepSeek V4.1 Flash prefill investigation results are in🔥
This is a dev post classified by AGK Intelligence as Security (news), kept by the Dev Radar because it carries real work, not commentary.
DeepSeek V4.1 Flash prefill investigation results are in🔥 I adapted the Qwen3.8 Flash Next @cohere's experiment to DeepSeek V4.1 Flash. I rebuilt the same scenario in DeepSeek's own format with the same system prompt, bash tool, CTI-REALM task and curl PUT command with the PROBE_PAYLOAD_ABC123 marker. Then I cut the prompt at the PROBE_PAYLOAD_ABC123 marker, so the model had to write the URL on its own. 𝗧𝗵𝗶𝘀 𝗶𝘀 𝘁𝗵𝗲 𝗿𝗲𝘀𝘂𝗹𝘁 𝗮𝗳𝘁𝗲𝗿 𝟭𝟬,𝟬𝟬𝟬 𝘀𝗮𝗺𝗽𝗹𝗲𝘀 👇 • wrote some URL: 98.07%, 95% confidence interval 97.80% to 98.34% • benign or real host: 69.29% • loopback: 17.23% • placeholder: 10.76% • cloud
Posted by Javier • priv/acc (4.9k followers) 2 days ago · 18 likes · 2.8k views · view the original post on X. Kept by the Dev Radar as Security. Tools mentioned: httpbin.org, transfer.sh, webhook.site, PTSV3, ntfy.sh.
More dev work like this
- #PHP2Shell. The #LiteLLM supply chain compromise. #Brotli2Shell. — @jfrog
- CVE-2024-21413: MonikerLink Outlook Vulnerability PoC — @DarkWebInformer
- CrowdStrike President Michael Sentonas joined Sascha Roehrer on deeptech INSIGHTS to… — @CrowdStrike
- I just shared this with my family, and you all should do it too. — @JJEnglert
- Securing AI shouldn't add complexity. — @PaloAltoNtwks
- Standing room only at the Boston Kubernetes Meetup last night for Teleport’s Paul Curtis… — @goteleport
- AI adoption is accelerating. Stopping emerging AI threats takes elite expertise. — @CrowdStrike
- Names, emails, API keys—Our ambassador @povedaai is putting MiniCPM4-0.5B to work… — @OpenBMB
Every post is read and classified by AGK Intelligence: what it is, which market it belongs to, and whether the link is a real tool. 31.2k posts from 5k X accounts over the last 21 days, 8.8k tools, 12 markets. New posts are collected several times an hour and the full ranking is recomputed every hour — last update 2026-10-30 21:12 UTC. Full method.