CVE-2026-54735

prebid-server's request forgery vulnerability allows for possible host environment data extraction

Published Jul 29, 2026 CVSS 3.1 · 10 Critical EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

Sign in to view the affected projects.

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
History
Type Values Removed Values Added
First Time appeared Prebid prebid Server
CPEs cpe:2.3:a:prebid:prebid_server:*:*:*:*:*:go:*:*
Vendors & Products Prebid prebid Server
Type Values Removed Values Added
First Time appeared Prebid
Prebid prebid-server
Vendors & Products Prebid
Prebid prebid-server
Type Values Removed Values Added
Metrics ssvc

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

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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
GitHub_M
Published
Updated
Jul 29, 2026, 6:04 PM
Reserved
Jun 15, 2026, 11:07 PM
Status
Analyzed
Published
Jul 29, 2026, 4:17 PM
Modified
Oct 23, 2026, 11:10 PM