{"id":"CVE-2026-54735","revision":"c8ec16e1cb1e4d82b65a4a424a5c4474","records":[{"revision":"c8ec16e1cb1e4d82b65a4a424a5c4474","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-54735","aliases":[],"title":"prebid-server's request forgery vulnerability allows for possible host environment data extraction","description":"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.","state":0,"publishedAt":"2026-07-29T15:59:46.64+00:00","modifiedAt":"2026-07-29T18:04:18.67+00:00","affected":[{"ecosystem":"Vendor product","name":"prebid-server","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"prebid\",\n                    \"product\": \"prebid-server\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.4.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":10,"severity":"CRITICAL"}],"references":["https://github.com/prebid/prebid-server/security/advisories/GHSA-4p3g-4hcj-wpvx","https://github.com/prebid/prebid-server/pull/4802","https://github.com/prebid/prebid-server/commit/494ac271cd4b5024df9123ef25ca3cff96390be3","https://github.com/prebid/prebid-server/releases/tag/v4.4.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54735","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-54735","identifiers":["CVE-2026-54735"]},"retained":false,"historicalAffected":[]}],"coverage":[]}