http4k prior 4.51.0.0/5.42.0.0/6.50.0.0 http4k-security-digest DigestAuthProvider.verify uri authentication replay

Summaryinfo

A vulnerability was found in http4k. It has been declared as critical. This affects the function DigestAuthProvider.verify of the component http4k-security-digest. Executing a manipulation of the argument uri can lead to authentication replay. This vulnerability is tracked as CVE-2026-54148. The attack can be launched remotely. No exploit exists. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in http4k. This vulnerability affects the function DigestAuthProvider.verify of the component http4k-security-digest. The manipulation of the argument uri with an unknown input leads to a authentication replay vulnerability. The CWE definition for the vulnerability is CWE-294. A capture-replay flaw exists when the design of the product makes it possible for a malicious user to sniff network traffic and bypass authentication by replaying it to the server in question to the same effect as the original message (or with minor changes). As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

http4k is a functional toolkit for Kotlin HTTP applications. Prior to 4.51.0.0, 5.42.0.0, and 6.50.0.0, DigestAuthProvider.verify in http4k-security-digest does not compare the uri parameter in an Authorization: Digest response with the actual request URL. An attacker who captures a valid Digest authentication response can replay it against another URL served by the same realm, bypassing the per-request-URI binding and potentially gaining unauthorized read or write access. This issue is fixed in versions 4.51.0.0, 5.42.0.0, and 6.50.0.0.

The advisory is available at github.com. This vulnerability was named CVE-2026-54148 since 06/11/2026. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit. This vulnerability is assigned to T1040 by the MITRE ATT&CK project.

Upgrading to version 4.51.0.0, 5.42.0.0 or 6.50.0.0 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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• http4k

Website

• Product: https://github.com/http4k/http4k/

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