How severe is GHSA-356w-63v5-8wf4?

No CVSS score has been assigned to GHSA-356w-63v5-8wf4 yet. Review the advisory details and affected package list to assess your exposure.

Which packages are affected by GHSA-356w-63v5-8wf4?

GHSA-356w-63v5-8wf4 affects the following packages: vite (npm), vite (npm), vite (npm), vite (npm), vite (npm). Ecosystems affected: npm.

How do I fix GHSA-356w-63v5-8wf4?

Update vite to 6.2.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-356w-63v5-8wf4 is resolved across your whole dependency graph.

How do I detect GHSA-356w-63v5-8wf4 in my npm dependencies?

Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for vite, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

How do I mitigate GHSA-356w-63v5-8wf4 if there is no patch (or I can't update yet)?

If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

How does O3 Security protect against GHSA-356w-63v5-8wf4?

O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-356w-63v5-8wf4 can be triaged on real exposure rather than presence alone.

Is GHSA-356w-63v5-8wf4 actively exploited in the wild?

No public exploit code has been indexed for GHSA-356w-63v5-8wf4 yet. This does not mean the vulnerability cannot be exploited — absence of public exploits does not imply safety. Apply the recommended fix and use O3 Security to monitor your exposure.

What is the EPSS score for GHSA-356w-63v5-8wf4?

GHSA-356w-63v5-8wf4 has an EPSS (Exploit Prediction Scoring System) score of 1.7%, placing it in the 76th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score indicates relatively lower exploitation probability, though the CVSS severity should still guide your patching priority.

What type of vulnerability is GHSA-356w-63v5-8wf4?

GHSA-356w-63v5-8wf4 is classified as Information Exposure (CWE-200). This weakness type describe the underlying flaw category, which helps determine the potential impact and the right class of mitigation.

Is there exploit tooling available for GHSA-356w-63v5-8wf4?

A Nuclei detection template exists for GHSA-356w-63v5-8wf4, meaning automated scanners can fingerprint it. Public exploit tooling significantly increases real-world risk — prioritize patching and ensure detection coverage. Exploit tooling should only ever be used in isolated, authorized testing environments.

When was GHSA-356w-63v5-8wf4 published, and has it been updated?

GHSA-356w-63v5-8wf4 was published on April 11, 2025 and was last updated on September 10, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

📦 npm

Not in CISA KEV

GHSA-356w-63v5-8wf4 — vite

Fix: vitejs/vite@175a839

GHSA-356w-63v5-8wf4 is a Information Exposure vulnerability in vite. A fix is available for vite — see the affected versions and patch details below.

Vite has an `server.fs.deny` bypass with an invalid `request-target`

Also known asCVE-2025-32395

Published

Apr 11, 2025

Updated

Sep 10, 2026

Affected

5 pkgs

Patched

5 / 5

Exploits

None indexed

Exploitation data as of Sep 21, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Exploitation Status

Proof-of-concept exploit code exists

CISA’s SSVC triage found public proof-of-concept exploit code for this CVE, though no confirmed active exploitation.

Exploitation and automatability from CISA’s SSVC triage for GHSA-356w-63v5-8wf4.

EPSS Exploitation Probability

via FIRST.org ↗

1.7%probability of exploitation in next 30 days

Lower Risk0.00%

Lower risk than most CVEs76th percentile — riskier than 76% of all scored CVEsHighest risk

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

Real-World Exposure

5 pkgs affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, and reverse-dependency count shows how many other packages break if it stays unpatched.

7Kother npm packages depend on this — each one inherits the vulnerability until it's patched upstream

vitenpm

132.5Mdownloads / week

Description

Summary

The contents of arbitrary files can be returned to the browser if the dev server is running on Node or Bun.

Impact

Only apps with the following conditions are affected.

explicitly exposing the Vite dev server to the network (using --host or server.host config option)
running the Vite dev server on runtimes that are not Deno (e.g. Node, Bun)

Details

HTTP 1.1 spec (RFC 9112) does not allow # in request-target. Although an attacker can send such a request. For those requests with an invalid request-line (it includes request-target), the spec recommends to reject them with 400 or 301. The same can be said for HTTP 2 (ref1, ref2, ref3).

On Node and Bun, those requests are not rejected internally and is passed to the user land. For those requests, the value of http.IncomingMessage.url contains #. Vite assumed req.url won't contain # when checking server.fs.deny, allowing those kinds of requests to bypass the check.

On Deno, those requests are not rejected internally and is passed to the user land as well. But for those requests, the value of http.IncomingMessage.url did not contain #.

PoC

npm create vite@latest
cd vite-project/
npm install
npm run dev

send request to read /etc/passwd

curl --request-target /@fs/Users/doggy/Desktop/vite-project/#/../../../../../etc/passwd http://127.0.0.1:5173

Affected Packages

5 total 5 fixed

Ecosystem	Package	Vulnerable range	Fix
📦npm	`vite`	≥ 6.2.0&&< 6.2.6	6.2.6`npm install vite@6.2.6`
📦npm	`vite`	≥ 6.1.0&&< 6.1.5	6.1.5`npm install vite@6.1.5`
📦npm	`vite`	≥ 6.0.0&&< 6.0.15	6.0.15`npm install vite@6.0.15`
📦npm	`vite`	≥ 5.0.0&&< 5.4.18	5.4.18`npm install vite@5.4.18`
📦npm	`vite`	all versions	4.5.13`npm install vite@4.5.13`

Detection & mitigation playbook

Open-source dependency

Detect
Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for vite, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.
Fix
Update vite to 6.2.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-356w-63v5-8wf4 is resolved across your whole dependency graph.
Workarounds
If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.
How O3 protects you
O3 Security's impact-aware SCA analyses which vulnerable code paths your application actually calls, so a match like GHSA-356w-63v5-8wf4 can be triaged on real exposure rather than presence alone.

Tailored to GHSA-356w-63v5-8wf4. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

How to detect GHSA-356w-63v5-8wf4

A community-maintained Nuclei template exists for this CVE. You can scan for it directly:

nuclei -id ghsa-356w-63v5-8wf4 -u https://target

Template: Vite - Path Traversal
Severity: medium
Impact: An unauthenticated attacker who can reach the Vite dev server (commonly exposed during development or in misconfigured deployments) can read arbitrary files on the host filesystem.
Remediation: Update to version 6.2.6, 6.1.5, 6.0.15, 5.4.18, or 4.5.13 or later.

Template by ProjectDiscovery nuclei-templates (ChrisJr404), MIT licensed. View the full template. Scan only systems you are authorised to test.

Frequently Asked Questions

### Summary The contents of arbitrary files can be returned to the browser if the dev server is running on Node or Bun. ### Impact Only apps with the following conditions are affected. - explicitly exposing the Vite dev server to the network (using --host or [server.host config option](https://vitejs.dev/config/server-options.html#server-host)) - running the Vite dev server on runtimes that are not Deno (e.g. Node, Bun) ### Details [HTTP 1.1 spec (RFC 9112) does not allow `#` in `request-target`](https://datatracker.ietf.org/doc/html/rfc9112#section-3.2). Although an attacker can send such

O3 Security · Impact-Aware SCA

Is GHSA-356w-63v5-8wf4 in your dependencies?

O3 Security finds GHSA-356w-63v5-8wf4 across npm dependencies, including transitive ones, and its impact-aware SCA ranks findings by whether your code actually calls the vulnerable path.

Scan my dependencies How O3 SCA works