Server-side request forgery in Prebid Server
CVSS score
10.0
EPSS probability
%0.6
Risk score
0.1
Published
2 mo ago
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Impact on My Inventory
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Vulnerability description
DayBreach CVE AI Research
CVE-2026-54735 has vendor, distribution, patch and security-source records on file. We can compare them and prepare an explanation linked to the evidence.
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.
IMPACT: Affected Products and Software
Affected Products
The following products are affected by CVE-2026-54735 vulnerability. Where our threat engine knows the exact affected versions, they are listed below.
| ID | VENDOR | PRODUCT | ACTION |
|---|---|---|---|
| 1 | prebid | prebid server | View |
| 2 | go | github.com/prebid/prebid-server/v4 | View |
| 3 | go | github.com/prebid/prebid-server/v3 | View |
| 4 | go | github.com/prebid/prebid-server/v2 | View |
| 5 | go | github.com/prebid/prebid-server | View |
| 6 | go | github.com/prebid/prebid-server/v3 | View |
| 7 | go | github.com/prebid/prebid-server/v2 | View |
| 8 | go | github.com/prebid/prebid-server | View |
RED HAT CSAF/VEX: Product Impact Check
SCORING: CVSS from Multiple Sources
CVSS Scores
The Common Vulnerability Scoring System is a standardised framework for assessing the severity of vulnerabilities in software and systems. We collect and display CVSS scores from several sources for each CVE.
| SCORE | VERSION | SEVERITY | VECTOR | SOURCE |
|---|---|---|---|---|
| 10.0 | CVSS 3.x | — | Vector not published | GitHub Advisory |
| 10.0 | CVSS V31 | CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H | NVD |
| 0.0 | CVSS 4.0 | — | Vector not published | GitHub Advisory |
Patch and Remediation Guide
Solution & Remediation Advisory
7 doğrulanmış yama veya düzeltilmiş sürüm kanıtı bulundu.
4.4.0OSV düzeltilmiş sürüm: 4.4.0
Public exploit and active exploitation status
Verified exploit intelligence
No verified public PoC, exploit repository or Metasploit module has been found for this CVE yet.
Weakness Classification and Attack Patterns (CWE & CAPEC)
CWE - Common Weakness Enumeration
While CVE identifies specific instances of vulnerabilities, CWE categorises the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-54735 is associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-54735 weaknesses.
Attack Vector and Accessibility
Official Sources and Advisories
Similar Vulnerabilities
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