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VULNERABILITIES

CVE-2026-54735 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:10 CRITICALVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/prebid/prebid-server/commit/494ac271cd4b5024df9123ef25ca3cff96390be3 [email protected]Patch
https://github.com/prebid/prebid-server/pull/4802 [email protected]Issue TrackingPatch
https://github.com/prebid/prebid-server/releases/tag/v4.4.0 [email protected]ProductRelease Notes
https://github.com/prebid/prebid-server/security/advisories/GHSA-4p3g-4hcj-wpvx [email protected]PatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-918Server-Side Request Forgery (SSRF)[email protected]

Affected Products

ProductVersions
prebid prebid server
< 4.4.0

CPE

  • cpe:2.3:a:prebid:prebid_server:*:*:*:*:*:go:*:*

Remediation

  • No remediation found in references.

Change History

3 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-54735
NVD Published Date:
Jul 29, 2026
NVD Last Modified:
Aug 18, 2026
Source:
[email protected]
CVE-2026-54735 Details - Not Deferred