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#7 The Hacker News general August 19, 2026 at 19:02 UTC

Cloudflare Workers Spectre Attack Leaks JWT From Co-Located Worker at 12 Bits/Second

By [email protected] (The Hacker News)

AI Summary

Researchers disclosed a remote Spectre-based side-channel attack against Cloudflare Workers that exfiltrated a JWT from a co-located Worker at 12 bits/second in the production environment — 360 times faster than a prior 2021 attack. The attack exploits CPU micro-architectural weaknesses in multi-tenant serverless environments, raising concerns about cross-tenant data isolation in cloud platforms.

Read full article → https://thehackernews.com/2026/08/cloudflare-worke…

Relevance score: 80.0/100

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