CVE-2026-54735 prebid-server's request forgery vulnerability allows for possible host environment data extraction

Prebid Server is an open-source solution for running real-time advertising auctions in the cloud. Prior to version 4.4.0, certain bidder adapters in Prebid Server interpolate user-supplied parameters into outbound request URLs without properly validating host and subdomain values, allowing crafte...

CVE-2026-54735

Prebid Server (open-source in real-time advertising auctions) contains a vulnerability (CVE-2026-54735) in versions prior to 4.4.0 where certain bidder adapters interpolate user-supplied parameters into outbound request URLs without proper host/subdomain validation, enabling crafted bid requests ...