Detections
Analytics
CVE-2026-54734
critical
Description
Prebid Server Java is the Java version of Prebid Server. Prior to 3.43.0, certain bidder adapters interpolate user-supplied parameters into outbound request URLs without using HttpUtil to validate the resulting domain or path segment. A malicious actor who can supply bid-request parameters can cause the server to send HTTP requests to unintended destinations, potentially reaching internal network services, metadata endpoints, or other sensitive server endpoints with the server's network access. This issue is fixed in version 3.43.0.
References
https://github.com/prebid/prebid-server-java/security/advisories/GHSA-fr2c-g2f8-qchg
https://github.com/prebid/prebid-server-java/releases/tag/3.43.0
https://github.com/prebid/prebid-server-java/pull/4522
https://github.com/prebid/prebid-server-java/commit/d0c723ce36aa09712c825ea9625d978f45d29a1c
https://github.com/prebid/prebid-server-java/commit/a129a685b6fc54441c1a779ce29ea4ec20c2e09f