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CVE

CVE-2026-54735

Server-side request forgery in bidder adapters in github.com/prebid/prebid-server/v4
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CVE

CVE-2026-54735

Server-side request forgery in bidder adapters in github.com/prebid/prebid-server/v4

In github.com/prebid/prebid-server/v4 before 4.4.0, multiple bidder adapters (acuityads, bidmachine, relevantdigital, smartyads, tappx, trafficgate, zeroclickfraud) interpolate user-supplied host and subdomain parameters into outbound request URLs without validation. A remote attacker can craft bid request parameters containing path traversals or target addresses to trigger server-side request forgery (SSRF), sending HTTP requests to internal network services or unintended endpoints.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
10
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
C
H
U
0
-
C
H
U
-

Related Resources

No items found.

References

https://github.com/prebid/prebid-server/security/advisories/GHSA-4p3g-4hcj-wpvx, https://github.com/prebid/prebid-server/pull/4802, https://github.com/prebid/prebid-server/commit/494ac271cd4b5024df9123ef25ca3cff96390be3, https://github.com/prebid/prebid-server/releases/tag/v4.4.0

Severity

10

CVSS Score
0
10

Basic Information

Base CVSS
10
EPSS Probability
0.00611%
EPSS Percentile
0.49282%
Introduced Version
0
Fix Available
4.4.0

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