Prebid Prebid Server vulnerabilities

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Published CVEs affecting Prebid Prebid Server: 1 record(s), with affected versions and fixes.
cpe:2.3:a:prebid:prebid_server

CVE-2026-54735 Critical · 10.0 CWE-918 Jul 29, 2026

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 crafted bid request parameters to cause server-side requests to unintended destinations and potentially expose internal network services or sensitive server endpoints. This issue is fixed in version 4.4.0.