GHSA-vfpm-58rq-9qcg: vite (CVE-2026-112947)

Package	Ecosystem	Affected	Fixed in
vite	npm	>=8.3.0, <8.3.3 \|\| >=8.2.0, <8.2.4	8.3.3, 8.2.4
vite-plus	npm	>=0.2.8, <1.1.0	1.1.0

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

The Vite dev server in the vite package (versions 8.2.0 up to 8.2.4, and 8.3.0 up to 8.3.3) and the vite-plus package (versions 0.2.8 up to 1.1.0) can return the first 4 bytes of files outside the server.fs allow list when a request includes the ?vite-wasm-instance query. The attack requires the dev server to be exposed to the network via --host or server.host, the target file to hold sensitive data in its first 4 bytes, and the project to run Vite on Node.js or Deno rather than Bun. Upgrade vite to 8.2.4 or 8.3.3, and vite-plus to 1.1.0.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
6.3	Medium	4.0	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 (GitHub_M)

CISA KEV Not listed.
EPSS 0.0050, the 43rd percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

31 Oct 2026, 13:33 UTC First seen by agentprime
31 Oct 2026, 13:33 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.