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.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-4p3g-4hcj-wpvx prebid-server's request forgery vulnerability allows for possible host environment data extraction
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Thu, 30 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
First Time appeared Prebid
Prebid prebid-server
Vendors & Products Prebid
Prebid prebid-server

Wed, 29 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Wed, 29 Jul 2026 16:15:00 +0000

Type Values Removed Values Added
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.
Title prebid-server's request forgery vulnerability allows for possible host environment data extraction
Weaknesses CWE-918
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-07-29T18:04:18.670Z

Reserved: 2026-06-15T23:07:33.233Z

Link: CVE-2026-54735

cve-icon Vulnrichment

Updated: 2026-07-29T18:04:14.876Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-30T14:01:58Z

Weaknesses