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CVE-2026-54735

nvd nist
Published: Jul 29, 2026Modified: Aug 18, 2026

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10.0
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploitability: 3.9 / Impact: 6.0
Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Prebid
1 product
Prebid Server
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Prebid Server
Before 4.4.0

Related CWEs

CWE-918
Server-Side Request Forgery (SSRF)
The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.

References (4)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
Issue TrackingPatch
Source: security-advisories@github.com
ProductRelease Notes
Source: security-advisories@github.com
PatchVendor Advisory

Timeline

No history available yet.