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Fencer Intel
medium 6.3

CVE-2026-112947 json

Vite: First 4 bytes of files outside of `server.fs` setting is exposed by `?vite-wasm-instance`

published 20d ago modified 19d ago also EUVD-2026-105135 , GHSA-vfpm-58rq-9qcg

cvss
6.3
version 4.0, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.5%
EPSS 0.5% chance of exploitation in 30 days, percentile 43%
public exploits
0
none known

Summary

Vite is a frontend tooling framework for JavaScript. From 8.2.0 until 8.2.4 and 8.3.3, the first 4 bytes of files outside of server.fs setting can be returned to the browser by a request containing ?vite-wasm-instance. Requests containing the ?vite-wasm-instance query are handled by the internal Wasm plugin's load hook. The hook removes the query and reads the resulting path directly from disk, but the server.fs checks were not applied. After reading the file, Vite attempts to parse it as WebAssembly. When that parse fails, Node and deno throws an error that contains the first 4 bytes of the file. This vulnerability is fixed in 8.2.4 and 8.3.3.

Patch / fix

  • npm vite 8.2.4, 8.3.3
  • npm vite-plus 1.1.0
  • vitejs vite 1.1.0, 8.2.4, 8.3.3

Is CVE-2026-112947 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

Check with Fencer

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-112947 updated cvss 5.3

vite: vite: Information disclosure via crafted WebAssembly query parameter

  • Red Hat AMQ Broker 7 amq-broker-bin.zip 7.14.1.CR3, amq-broker-maven-repository.zip 7.14.1.CR3
    affected: no fix available “Fix deferred”
  • Red Hat Ansible Automation Platform 2 automation-controller 4.5.37-1.el8ap, automation-platform-ui 2.6.15-1.el9ap, automation-gateway 2.5.20260923-1.el9ap, ansible-automation-platform-26/gateway-rhel9, ansible-automation-platform-27/gateway-rhel9, automation-eda-controller 1.0.10-0.1.20260317.git9cae940.el8ap
    affected: no fix available, no fix planned “Out of support scope”
  • Red Hat Build of Keycloak rhbk-quarkus-dist.zip 26.6.7.CR1, keycloak-operator.redhat-00001.zip 26.6.6, keycloak-operator.redhat-00003.zip 26.6.7 Red Hat Build of Podman Desktop rh-podman-desktop 3c6fc75a2a6cf5bb9b8a667fddcbbf428132badc Red Hat JBoss Enterprise Application Platform 8 jboss-eap-runtime-maven-repository.zip 8.1.2, jboss-eap.1-runtime-maven-repository.zip 8.1.0 Red Hat JBoss Enterprise Application Platform Expansion Pack jboss-eap-runtime-maven-repository.zip 8.1.2, jboss-eap.1-runtime-maven-repository.zip 8.1.0 Red Hat OpenShift AI (RHOAI) rhoai/odh-feature-server-rhel9 Red Hat OpenShift Dev Spaces devspaces/openvsx-rhel9
    +1 more products
    Red Hat Trusted Artifact Signer rhtas/rhtas-console-ui-rhel9
    affected: no fix available “Fix deferred”
  • Red Hat Hardened Images grafana13.2 13.2.3-0.3.hum1, prometheus3.13 3.13.4-0.1.hum1
    not affected: component not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
partial
Assessed
19d ago

Exploit prediction

0.50% chance of exploitation in the next 30 days, higher than 43% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
CNA 4.0 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
CNA 4.0 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

Affected packages

ecosystem package affected fixed in
npm vite
>=8.3.0, <8.3.3
>=8.2.0, <8.2.4
8.3.3
8.2.4
npm vite-plus
>=0.2.8, <1.1.0
1.1.0

Affected products

  • vitejs vite
  • vitejs vite-plus

Classification

Weakness
  • CWE-22 Improper Limitation of a Pathname to a Restricted Directory
  • CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
  • CWE-209 Generation of Error Message Containing Sensitive Information

References

Sources

Fencer Intel 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.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.