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CVE

CVE-2026-54734

Prebid Server Java: Vulnerability to request forgery allows for possible host environment data extraction
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CVE

CVE-2026-54734

Prebid Server Java: Vulnerability to request forgery allows for possible host environment data extraction

Prebid Server Java is the Java version of Prebid Server. Prior to 3.43.0, certain bidder adapters interpolate user-supplied parameters into outbound request URLs without using HttpUtil to validate the resulting domain or path segment. A malicious actor who can supply bid-request parameters can cause the server to send HTTP requests to unintended destinations, potentially reaching internal network services, metadata endpoints, or other sensitive server endpoints with the server's network access. This issue is fixed in version 3.43.0.

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-java/releases/tag/3.43.0, https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54734.json, https://github.com/prebid/prebid-server-java/security/advisories/GHSA-fr2c-g2f8-qchg, https://nvd.nist.gov/vuln/detail/CVE-2026-54734, https://github.com/prebid/prebid-server-java/commit/a129a685b6fc54441c1a779ce29ea4ec20c2e09f, https://github.com/prebid/prebid-server-java/commit/d0c723ce36aa09712c825ea9625d978f45d29a1c, https://github.com/prebid/prebid-server-java/pull/4522

Severity

10

CVSS Score
0
10

Basic Information

Base CVSS
10
EPSS Probability
0.00621%
EPSS Percentile
0.4854%
Introduced Version
0
Fix Available
ba7f97e33fe1dcc5e64f926bc8bea5d4d4252fc1

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