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CVE-2026-54735— prebid-server's request forgery vulnerability allows for possible host environment data extraction

CVSS 10.0 · Critical

Affected Version Matrix 1

VendorProductVersion RangeStatus
prebidprebid-server< 4.4.0affected
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I. Basic Information for CVE-2026-54735

Vulnerability Information
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Vulnerability Title
prebid-server's request forgery vulnerability allows for possible host environment data extraction
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5

Affected Products

VendorProductAffected VersionsCPESubscribe
prebidprebid-server < 4.4.0 -

II. Public POCs for CVE-2026-54735

#POC DescriptionSource LinkShenlong Link
AI-Generated POCPremium
Qwen3.6-35B-A3B · 7544 chars
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III. Intelligence Information for CVE-2026-54735

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Patches & Fixes for CVE-2026-54735 (1)

Vendor Advisories for CVE-2026-54735 (1)

Vendor Pages for CVE-2026-54735 (1)

IV. Related Vulnerabilities

Same vendor: prebid
Same weakness: CWE-918

V. Comments for CVE-2026-54735

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