Skip to main content

Can a WAF protect against supply chain attacks on third-party JavaScript libraries?

WAFs cannot protect against client-side supply chain attacks because they don't intercept the fetch to the 3rd party endpoint and therefore have no visibility into the JavaScript files from the 3rd party sources. Even in the event of an attack on popular libraries or CDNs, the malicious payloads continue to be delivered from the same trusted sources that your WAF has whitelisted. Your WAF still sees these compromised sources as legitimate requests and allows them through, not knowing that the contents have been weaponized by bad actors.

Questions left?
Get answers from our experts

Book a demo

Want to walk through this with an engineer?

Thirty minutes, on your own site. Not a slide deck.

Book a personalized demo to see:

How to achieve PCI DSS requirement 6.4.3 & 11.6.1 compliance in 1 day
Why third-party scripts are a security risk for you and your visitors
Monitoring privacy and consent leakage (GDPR, CCPA) across every third party
Stopping signup abuse, account sharing, and chargeback fraud with device intelligence
Detecting and controlling AI agents and bots hitting your site in real time

Rather just send a question?

Finding open slots…

Real humans only. We'd know.

Having trouble booking? Open scheduler in a new tab

What are you trying to solve?

Tell us in a line and we'll come back with something useful, not a generic pitch.

We usually help with:

Seeing which third-party scripts run on your site
PCI DSS 6.4.3 and 11.6.1 evidence
Bots, AI agents and account takeover

Prefer to just book a time? Pick a slot instead