Is CVE-2026-6414 actively exploited?

No active exploitation of CVE-2026-6414 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-6414 be exploited remotely?

Yes. CVE-2026-6414 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-6414?

CVE-2026-6414 has a CVSS score of 5.9 (MEDIUM).

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MEDIUM

CVE-2026-6414

CWE-177Published: April 16, 2026· Updated: Apr 17, 2026

5.9

CVSS v3.1

EPSS:0.01%probability of exploitation in 30 daysPercentile:1.2th

Official Description

@fastify/static versions 8.0.0 through 9.1.0 decode percent-encoded path separators (%2F) before filesystem resolution, while Fastify's router treats them as literal characters. This mismatch allows attackers to bypass route-based middleware or guards that protect files served by @fastify/static. For example, a route guard on a protected path can be circumvented by encoding the path separator in the URL. Upgrade to @fastify/static 9.1.1 to fix this issue. There are no workarounds.

NVD Source

Technical Analysis

CVE-2026-6414 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.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 5.9.