{"id":"CVE-2026-54735","revision":null,"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. 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This issue is fixed in version 4.4.0.","state":0,"publishedAt":"2026-07-29T16:17:54.317+00:00","modifiedAt":"2026-10-23T23:10:00.157+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","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/commit/494ac271cd4b5024df9123ef25ca3cff96390be3","https://github.com/prebid/prebid-server/pull/4802","https://github.com/prebid/prebid-server/releases/tag/v4.4.0","https://github.com/prebid/prebid-server/security/advisories/GHSA-4p3g-4hcj-wpvx"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54735","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-918"],"productCriteria":["cpe:2.3:a:prebid:prebid_server:*:*:*:*:*:go:*:*"],"sourceDates":{"published":"2026-07-29T16:17:54.317","lastModified":"2026-10-23T23:10:00.157"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-54735","identifiers":["CVE-2026-54735"]},"retained":false,"historicalAffected":[]},{"revision":"bf971f4bd3eb40e8bc308d01c98d8a7f","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-4p3g-4hcj-wpvx","aliases":["CVE-2026-54735","GO-2026-6139"],"title":"prebid-server's request forgery vulnerability allows for possible host environment data extraction","description":"### Impact\nCertain bidder adapters accept user-supplied parameters that are interpolated into outbound request URLs. Without proper input validation, a malicious actor could craft bid request parameters that cause the server to send HTTP requests to unintended destinations, potentially exposing internal network services or sensitive server endpoints to unauthorized access.\n\n### Patches\nPatched in [v4.4.0](https://github.com/prebid/prebid-server/releases/tag/v4.4.0)\n\n### Workarounds\nIf one is unable to update, please make sure that the affected bidder adapters are disabled.","state":0,"publishedAt":"2026-07-29T16:00:36+00:00","modifiedAt":"2026-08-18T17:23:47.7043999+00:00","affected":[{"ecosystem":"Go","name":"github.com/prebid/prebid-server/v4","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.4.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/prebid/prebid-server/v3","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"3.30.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/prebid/prebid-server/v2","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"2.32.0"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"Go","name":"github.com/prebid/prebid-server","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"last_affected","version":"0.275.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"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","https://github.com/prebid/prebid-server/releases/tag/v4.4.0"],"sourceUrl":"https://github.com/advisories/GHSA-4p3g-4hcj-wpvx","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-4p3g-4hcj-wpvx","identifiers":["GHSA-4p3g-4hcj-wpvx","CVE-2026-54735","GO-2026-6139"]},"retained":false,"historicalAffected":[]},{"revision":"a41852e96ea042a8a18631099f2a54d6","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GO-2026-6139","aliases":["CVE-2026-54735","GHSA-4p3g-4hcj-wpvx"],"title":"Server-side request forgery in bidder adapters in github.com/prebid/prebid-server/v4","description":"In github.com/prebid/prebid-server/v4 before 4.4.0, multiple bidder adapters (acuityads, bidmachine, relevantdigital, smartyads, tappx, trafficgate, zeroclickfraud) interpolate user-supplied host and subdomain parameters into outbound request URLs without validation. A remote attacker can craft bid request parameters containing path traversals or target addresses to trigger server-side request forgery (SSRF), sending HTTP requests to internal network services or unintended endpoints.","state":0,"publishedAt":"2026-08-18T16:38:10+00:00","modifiedAt":"2026-08-18T17:15:27.926496+00:00","affected":[{"ecosystem":"Go","name":"github.com/prebid/prebid-server/v4","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.4.0"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[],"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://osv.dev/vulnerability/GO-2026-6139","license":"OSV · upstream source license applies","key":"osv:GO-2026-6139","identifiers":["GO-2026-6139","CVE-2026-54735","GHSA-4p3g-4hcj-wpvx"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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