Bug 2458941 (CVE-2026-6410)

Summary:	CVE-2026-6410 @fastify/static: @fastify/static: Information disclosure via path traversal when directory listing is enabled.
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	bbrownin, jkoehler, lphiri, sdawley
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A flaw was found in @fastify/static. When directory listing is enabled, a remote unauthenticated attacker can exploit a path traversal vulnerability. This occurs because the dirList.path() function incorrectly resolves directories outside the configured static root. Successful exploitation allows the attacker to obtain directory listings for arbitrary directories, leading to the disclosure of directory and file names.	Story Points:	---
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Last Closed:		Type:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description OSIDB Bzimport 2026-04-16 14:02:03 UTC

@fastify/static versions 8.0.0 through 9.1.0 allow path traversal when directory listing is enabled via the list option. The dirList.path() function resolves directories outside the configured static root using path.join() without a containment check. A remote unauthenticated attacker can obtain directory listings for arbitrary directories accessible to the Node.js process, disclosing directory and file names. File contents are not disclosed. Upgrade to @fastify/static 9.1.1 to fix this issue. As a workaround, disable directory listing by removing the list option from the plugin configuration.