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Fencer Vulns
high 7.5

CVE-2024-23331 json

Vite dev server option `server.fs.deny` can be bypassed when hosted on case-insensitive filesystem

published 2024-01-19 2 y ago modified 2026-09-10 1 mo ago also GHSA-c24v-8rfc-w8vw , EUVD-2024-0322

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

Vite is a frontend tooling framework for javascript. The Vite dev server option `server.fs.deny` can be bypassed on case-insensitive file systems using case-augmented versions of filenames. Notably this affects servers hosted on Windows. This bypass is similar to CVE-2023-34092 -- with surface area reduced to hosts having case-insensitive filesystems. Since `picomatch` defaults to case-sensitive glob matching, but the file server doesn't discriminate; a blacklist bypass is possible. By requesting raw filesystem paths using augmented casing, the matcher derived from `config.server.fs.deny` fails to block access to sensitive files. This issue has been addressed in vite@5.0.12, vite@4.5.2, vite@3.2.8, and vite@2.9.17. Users are advised to upgrade. Users unable to upgrade should restrict access to dev servers.

Patch / fix

  • npm vite 2.9.17, 3.2.8, 4.5.2, 5.0.12
  • vitejs vite 2.9.17, 3.2.8, 4.5.2, 5.0.12
  • velociraptor openSUSE Tumbleweed 0.7.0.4.git142.862ef23-1.1

opensuse advisories openSUSE-SU-2025:14663-1

CISA SSVC

Exploitation
Proof of concept is public
Automatable
no
Technical impact
partial
Assessed
2 y ago

Exploit prediction

0.78% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/vitejs/vite/security/advisories/GHSA-c24v-8rfc-w8vw referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem package affected fixed in
npm vite
>=2.7.0, <2.9.17
>=3.0.0, <3.2.8
>=4.0.0, <4.5.2
>=5.0.0, <5.0.12
2.9.17
3.2.8
4.5.2
5.0.12

Affected products

  • vitejs vite

Classification

Weakness
  • CWE-178 Improper Handling of Case Sensitivity
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-284 Improper Access Control

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.