Is CVE-2024-45614 actively exploited?

No active exploitation of CVE-2024-45614 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2024-45614 be exploited remotely?

Yes. CVE-2024-45614 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2024-45614?

CVE-2024-45614 has a CVSS score of 5.4 (MEDIUM).

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MEDIUM

CVE-2024-45614

CWE-639Published: September 19, 2024· Updated: Jun 17, 2026

5.4

CVSS v3.1

Official Description

Puma is a Ruby/Rack web server built for parallelism. In affected versions clients could clobber values set by intermediate proxies (such as X-Forwarded-For) by providing a underscore version of the same header (X-Forwarded_For). Any users relying on proxy set variables is affected. v6.4.3/v5.6.9 now discards any headers using underscores if the non-underscore version also exists. Effectively, allowing the proxy defined headers to always win. Users are advised to upgrade. Nginx has a underscores_in_headers configuration variable to discard these headers at the proxy level as a mitigation. Any users that are implicitly trusting the proxy defined headers for security should immediately cease doing so until upgraded to the fixed versions.

NVD Source

Technical Analysis

CVE-2024-45614 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.