prebid/prebid-server · Security
prebid-server's request forgery vulnerability allows for possible host environment data extraction
- GHSA ID
- GHSA-4p3g-4hcj-wpvx
- CVE ID
- CVE-2026-54735
- Severity
- critical
- Published
- Updated
- CVSS
- 10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- CVSS v3
- 10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Description
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.
CWEs
- CWE-918 · Server-Side Request Forgery (SSRF)
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 ↗
- https://github.com/advisories/GHSA-4p3g-4hcj-wpvx ↗