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CVE

CVE-2026-54735

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

CVE-2026-54735

prebid-server's request forgery vulnerability allows for possible host environment data extraction

Impact

Certain bidder adapters accept user-supplied parameters that are interpolated into outbound request URLs. Without proper input validation, a malicious actor could craft bid request parameters that cause the server to send HTTP requests to unintended destinations, potentially exposing internal network services or sensitive server endpoints to unauthorized access.

Patches

Patched in v4.4.0

Workarounds

If one is unable to update, please make sure that the affected bidder adapters are disabled.

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
-
3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
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, https://github.com/prebid/prebid-server/releases/tag/v4.4.0

Severity

10

CVSS Score
0
10

Basic Information

Base CVSS
10
EPSS Probability
0.00345%
EPSS Percentile
0.28002%
Introduced Version
0
Fix Available
4.4.0

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