Which products and versions are affected by CVE-2026-39365?

Affected: Vite (Vitejs) versions >= 8.0.0, >= >= 8.0.0, < 8.0.5; Vite\+ (Voidzero); commercial-gitlab-rails-ee-19.1 (chainguard), among others. The full list is in the CVE brief.

Is CVE-2026-39365 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since May 22, 2026.

Is CVE-2026-39365 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2026-39365?

Public exploit code is available.

Is there a fix for CVE-2026-39365?

Fixed versions are available, including @rootio/vite 5.4.21-root.io.1, @rootio/vite 5.4.21-root.io.2, @rootio/vite 5.4.21-root.io.3.

How urgently should CVE-2026-39365 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2026-39365

Q: What is CVE-2026-39365?

Vite is a frontend tooling framework for JavaScript.

Q: Is CVE-2026-39365 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed since May 22, 2026.

Q: Is CVE-2026-39365 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Q: Is there a public exploit for CVE-2026-39365?

Public exploit code is available.

Q: Is there a fix for CVE-2026-39365?

Fixed versions are available, including @rootio/vite 5.4.21-root.io.1, @rootio/vite 5.4.21-root.io.2, @rootio/vite 5.4.21-root.io.3.

Q: How urgently should CVE-2026-39365 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

MediumExploitedPublic exploit

Vite Vulnerable to Path Traversal in Optimized Deps .map Handling

Published Apr 6, 2026 · Updated Sep 10, 2026 · Also known as GHSA-4w7w-66w2-5vf9, ROOT-APP-NPM-CVE-2026-39365

Key Facts

Patch immediately

CVE-2026-39365 is a medium-severity vulnerability (CVSS 6.3 v4) affecting Vite (Vitejs), Vite\+ (Voidzero), commercial-gitlab-rails-ee-19.1 (chainguard) and 22 more products.
It is exploited in the wild, listed in Industry KEV feed since May 22, 2026. Public exploit code is available.
EPSS estimates a 1.0% probability of exploitation in the next 30 days.
Fixed versions are available, including @rootio/vite 5.4.21-root.io.1, @rootio/vite 5.4.21-root.io.2, @rootio/vite 5.4.21-root.io.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v4

6.3

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS (30-day exploit likelihood)

1.0%

Higher than 61.6% of all scored CVEs

Exploited in the wild

Yes

1 catalog listing

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2026-39365 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

Description

Vite is a frontend tooling framework for JavaScript. From 6.0.0 to before 6.4.2, 7.3.2, and 8.0.5, the dev server’s handling of .map requests for optimized dependencies resolves file paths and calls readFile without restricting ../ segments in the URL. As a result, it is possible to bypass the server.fs.strict allow list and retrieve .map files located outside the project root, provided they can be parsed as valid source map JSON. This vulnerability is fixed in 6.4.2, 7.3.2, and 8.0.5.

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	May 22, 2026	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

37 affected entries in total

Product	Affected versions	Fixed in
ViteVitejs	>= 8.0.0, >= >= 8.0.0, < 8.0.5	6.4.1
Vite\+Voidzero	See advisory	0.1.15
commercial-gitlab-rails-ee-19.1chainguard	See advisory	19.1.7-r3
commercial-gitlab-rails-ee-19.2chainguard	See advisory	19.2.7-r1
commercial-gitlab-rails-ee-19.3chainguard	See advisory	19.3.3-r1

20 more affected products in the full CVE brief

Patched Releases

@rootio/vite

5.4.21-root.io.1, 5.4.21-root.io.2, 5.4.21-root.io.3

@seal-security/vite

4.4.11-sp999

commercial-gitlab-rails-ee-19.1

19.1.7-r3

commercial-gitlab-rails-ee-19.2

19.2.7-r1

commercial-gitlab-rails-ee-19.3

19.3.3-r1

commercial-gitlab-rails-ee-19.4

19.4.1-r1

commercial-gitlab-rails-ee-fips-19.2

19.2.7-r1

commercial-gitlab-rails-ee-fips-19.3

19.3.3-r1

commercial-gitlab-rails-ee-fips-19.4

19.4.1-r1

gitlab-rails-ce-19.1

19.1.2-r2

gitlab-rails-ce-fips-19.1

19.1.1-r3

gitlab-rails-ce-fips-19.2

19.2.1-r1

kubeflow-pipelines-frontend

2.17.0-r0

langfuse-2

2.95.12-r19

langfuse-3

3.164.0-r5, 3.187.0-r0

langfuse-fips-2

2.95.12-r22

langfuse-fips-3

3.164.0-r3

openclaw

2026.4.7-r0

trigger-dev

4.5.11-r1

verdaccio

6.6.0-r0

Vite

4.4.11-sp999, 5.4.21-aikido.2, 5.4.21-aikido.3, 6.4.2, 7.3.2, 8.0.11-r0, 8.0.5, 6.4.1

vite-plus

0.1.16

vitess-22

22.0.4-r9

vitess-23

23.0.3-r11

Vite\+

0.1.15

Timeline

Publicly disclosed
Apr 6, 2026
Added to Industry KEV feed
May 22, 2026
Last updated
Sep 10, 2026

Weakness Type

CWE-22 Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

5 more references in the full CVE brief

FAQ

Common Questions.

Vite is a frontend tooling framework for JavaScript.
Affected: Vite (Vitejs) versions >= 8.0.0, >= >= 8.0.0, < 8.0.5; Vite\+ (Voidzero); commercial-gitlab-rails-ee-19.1 (chainguard), among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed since May 22, 2026.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
Fixed versions are available, including @rootio/vite 5.4.21-root.io.1, @rootio/vite 5.4.21-root.io.2, @rootio/vite 5.4.21-root.io.3.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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