Cloudflare disclosed that 155 responses from GLM-5.3 on Workers AI carried fragments of other customers' prompts
AspireAI community · Cloudflare
*Cloudflare disclosed that 155 responses from GLM-5.3 on Workers AI carried fragments of other customers' prompts.* Between August 27 and September 9, a prompt longer than 681,280 tokens could return text belonging to earlier sessions: the over-length request was quietly swapped for a one-token placeholder, and the decode node then answered over cache pages still holding someone else's data.
The reusable part is the fix. Cloudflare doubled the prefill cache pool so valid prompts never reach the rejection path, and patched the engine to retire rejected requests before handoff. SGLang upstreamed it in v0.5.21 and v0.5.22.
The honest limit: Cloudflare found no evidence of deliberate exploitation, and the window closed in September.
https://blog.cloudflare.com/kv-cache-exposure-remediation
Read the story and explore more from the AspireAI community.
Two sparse-autoencoder analyses have resisted scaling: matching semantically similar features across layers, and compressing large feature circuits into interpretable supernodes. This paper argues both are the same underlying problem, estimating semantic distances between SAE features that sit on different activation manifolds. Its representation treats each feature not as a single decoder vector but as an activation-weighted distribution over the hidden states expressing it, projects those distributions into a shared reference space, and compares them with Wasserstein distance. The representation is proved invariant to activation rescaling and stable under perturbation, and recovers true matches under finite-sample margin conditions. Empirically it outperformed decoder-vector and LLM-based baselines and captured subtle functional distinctions between related features, and it compressed large feature circuits into interpretable supernodes automatically. The limitation is that this is interpretability tooling: the paper demonstrates better feature matching and circuit compression, not that downstream interpretability claims become more accurate.