CVE-2026-6410Network attack vector

Directory-name disclosure via unchecked path joining

Published Apr 16, 2026 · Updated Apr 16, 2026

Path traversal in @fastify/static 8.0.0 through 9.1.0 allows remote attackers to list names outside the configured static root. The dirList.path() function passes the request path to path.join() without checking that the resolved directory remains beneath the configured root. Directory listing must be enabled through the list option; exploitation is unauthenticated and reveals directory and file names, but not file contents.

CVSS severity5.3
Medium
EPSS probability0.51%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Path traversal in @fastify/static 8.0.0 through 9.1.0 allows remote attackers to list names outside the configured static root. The dirList.path() function passes the request path to path.join() without checking that the resolved directory remains beneath the configured root. Directory listing must be enabled through the list option; exploitation is unauthenticated and reveals directory and file names, but not file contents.

The record

CVE
CVE-2026-6410
Published
Apr 16, 2026
Updated
Apr 16, 2026
Vendor
Fastify
Product
@fastify/static
Classifications
CWE-22, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=8.0.0 <9.1.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Fastify · @fastify/staticversion=8.0.0 <9.1.1

Published CVSS scores

5.3OpenJS Foundation CNACVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-22Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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