There's a huge amount of unnecessary extraneous details in the headline that distract from "this is a Cloudflare bug".
Which part of that is not claiming the exposure is in X model? Cloudflare is stopping to be cool, this is the start. I guess, cf is now big enough for enshitification to start.
"On September 8, 2026, we were alerted by a security researcher, Gadi Evron from Knostic, to a tenant isolation issue affecting the GLM-5.3 Workers AI model (@cf/zai-org/glm-5.3) starting on August 27, 2026."
Meaning the issue was a cache exposure with the GLM-5.3 Workers AI model. If the title was, "Cache exposure issue with GLM-5.3," I would agree it's ambiguous and maybe intentionally harmful. But it literally says, "Workers AI model" which is clearly a Cloudflare product.
Downthread I suggested "Cloudflare configuration error leaked data between user sessions" which I think is far better. You could improve on it further: "Cloudflare AI worker configuration error leaked data between user sessions". But this could have happened with any model.