@fastify/static vulnerable to path traversal in directory listing
### Impact `@fastify/static` v9.1.0 and earlier serves directory listings outside the configured static root when the `list` option is enabled. A request such as `/public/../outside/` causes `dirList.path()` to resolve a directory outside the root via `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 names and filenames that should not be exposed. File contents are not disclosed. ### Patches Upgrade to `@fastify/static` >= 9.1.1. ### Workarounds Disable directory listing by removing the `list` option from the plugin configuration.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-6410US | — | — | ||
@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 th… | ||||
references
External citations — patches, advisories, analysis.
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