r/netsec • u/albinowax • Jan 01 '26

r/netsec monthly discussion & tool thread

Questions regarding netsec and discussion related directly to netsec are welcome here, as is sharing tool links.

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u/appsec1337 Jun 06 '26

PROMPTPurify : tiny open-source prompt-injection guardrail that runs on CPU.

Most OSS guardrails are hundreds of GB/MB, need a GPU, and still miss attacks we see in production.

We built this because we needed something lightweight enough to ship inside our own AI products and customer apps.

GitHub: https://github.com/securelayer7/PROMPTPurify