How severe is CVE-2026-6410?

CVE-2026-6410 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.

Is CVE-2026-6410 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-6410?

CVE-2026-6410 affects Fastify Fastify-static. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-6410?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-6410 have an EU (EUVD) identifier?

Yes. CVE-2026-6410 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23243.

When was CVE-2026-6410 published?

CVE-2026-6410 was published on 2026-04-16 and last updated on 2026-06-17.

CVE-2026-6410

CVE-2026-6410 is a medium-severity vulnerability in Fastify Fastify-static with a CVSS 3.x base score of 5.3. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
EPSS exploit prediction: 1% (43rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-23243
Weakness: CWE-22
Affected product: Fastify Fastify-static
Published: 2026-04-16
Last modified: 2026-06-17

Description

@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.

Frequently asked questions

What is CVE-2026-6410?: @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.
How severe is CVE-2026-6410?: CVE-2026-6410 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is low, integrity none, and availability none.
Is CVE-2026-6410 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (43rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-6410?: CVE-2026-6410 affects Fastify Fastify-static. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-6410?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-6410 have an EU (EUVD) identifier?: Yes. CVE-2026-6410 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-23243.
When was CVE-2026-6410 published?: CVE-2026-6410 was published on 2026-04-16 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:fastify:fastify-static:*:*:*:*:*:*:*:*

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