TI-2026-76915 Aliases CVE-2026-112948 GHSA-p458-7748-mcp3

Vitest servers misapply server.fs.deny, exposing sensitive files

LOW 29CWE-200Published 2026-10-20 · Updated 2026-10-20

Key facts

Attack vector: Network
Privileges required: None
User interaction: Required
Attack complexity: Low
Impact type: Information disclosure
Confidentiality · integrity · availability: High · None · None
Fix status: Partial Red Hat: 7 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-200.

Summary

Vitest, @vitest/ui and @vitest/browser from 5.0.0-beta.6 before 5.0.5, and vite-plus from 1.0.0-rc.0 before 1.3.0, are affected. Dev servers misapply server.fs.deny rules, so denied files stay reachable (CWE-200). An attacker who can reach an affected server can read denied project files or the fallback API token, and a malicious website can read .env values in Browser Mode with test.projects.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Description from the CNA

Vitest is a testing framework powered by Vite. From 5.0.0-beta.6 until 5.0.5, Vitest dev servers can misapply server.fs.deny because project servers replace Vite's defaults and the root server adds .vitest-secret-token after Vite compiles its matcher. An attacker who can reach an affected UI, Browser Mode, or API server can read denied project files or the fallback API token at node_modules/.vitest/.vitest-secret-token, and Browser Mode with test.projects can expose JavaScript-compatible .env values through a malicious website. This issue is fixed in version 5.0.5.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.004 34th percentileScored 2026-11-07

Fix Partial vitest (vitest-dev): 5.0.5browser (@vitest): 5.0.5+5 more productsRed Hat: 7 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
vitest-dev	vitest	5.0.0-beta.6 to before 5.0.5	5.0.5	Patch available	CNA
@vitest	browser	5.0.0-beta.6 to before 5.0.5	5.0.5	Patch available	CNA
@vitest	ui	5.0.0-beta.6 to before 5.0.5	5.0.5	Patch available	CNA
vitejs	vite-plus	1.0.0-rc.0 to before 1.3.0	1.3.0	Patch available	CNA
—	@vitest/ui (npm)	5.0.0-beta.6 to before 5.0.5	5.0.5	Patch available	GHSA-p458-7748-mcp3
—	@vitest/browser (npm)	5.0.0-beta.6 to before 5.0.5	5.0.5	Patch available	GHSA-p458-7748-mcp3
—	vite-plus (npm)	1.0.0-rc.0 to before 1.3.0	1.3.0	Patch available	GHSA-p458-7748-mcp3

vitest Vendorvitest-dev Affected 5.0.0-beta.6 to before 5.0.5 Fixed in 5.0.5 Patch available CNA
browser Vendor@vitest Affected 5.0.0-beta.6 to before 5.0.5 Fixed in 5.0.5 Patch available CNA
ui Vendor@vitest Affected 5.0.0-beta.6 to before 5.0.5 Fixed in 5.0.5 Patch available CNA
vite-plus Vendorvitejs Affected 1.0.0-rc.0 to before 1.3.0 Fixed in 1.3.0 Patch available CNA
@vitest/ui (npm) Vendor— Affected 5.0.0-beta.6 to before 5.0.5 Fixed in 5.0.5 Patch available GHSA-p458-7748-mcp3
@vitest/browser (npm) Vendor— Affected 5.0.0-beta.6 to before 5.0.5 Fixed in 5.0.5 Patch available GHSA-p458-7748-mcp3
vite-plus (npm) Vendor— Affected 1.0.0-rc.0 to before 1.3.0 Fixed in 1.3.0 Patch available GHSA-p458-7748-mcp3

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:vitest.dev:vitest::::::::	—	—	vitest-dev

cpe:2.3:a:vitest.dev:vitest:*:*:*:*:*:*:*:* Versions — — ·vitest-dev

Remediation

Upgrade Vitest, @vitest/ui and @vitest/browser to 5.0.5, and vite-plus to 1.3.0. Red Hat rates this Moderate and has no plan available for Red Hat AMQ Broker 7, Red Hat Ansible Automation Platform 2, Red Hat Build of Keycloak, Red Hat Build of Podman Desktop, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack and Red Hat Trusted Artifact Signer.

Written with Claude Haiku 5.5 from the sources below · 2026-11-06

Fix · CNA vitest (vitest-dev) Fixed in 5.0.5
Fix · CNA browser (@vitest) Fixed in 5.0.5
Fix · CNA ui (@vitest) Fixed in 5.0.5
Fix · CNA vite-plus (vitejs) Fixed in 1.3.0
Fix · GHSA-p458-7748-mcp3 @vitest/ui (npm) Fixed in 5.0.5 Advisory →
Fix · GHSA-p458-7748-mcp3 @vitest/browser (npm) Fixed in 5.0.5 Advisory →
Fix · GHSA-p458-7748-mcp3 vite-plus (npm) Fixed in 1.3.0 Advisory →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Red Hat AMQ Broker 7	Affected	No fix yet: Fix deferred
Red Hat Ansible Automation Platform 2	Affected	No fix yet: Fix deferred
Red Hat Build of Keycloak	Affected	No fix yet: Fix deferred
Red Hat Build of Podman Desktop	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform 8	Affected	No fix yet: Fix deferred
Red Hat JBoss Enterprise Application Platform Expansion Pack	Affected	No fix yet: Fix deferred
Red Hat Trusted Artifact Signer	Affected	No fix yet: Fix deferred

Not affected: 1 product

Red Hat Hardened Images

Timeline

2026-10-20 Threatist record created from CVE-2026-112948
2026-10-20 CISA SSVC decision points changed
2026-10-20 Priority changed: MEDIUM → LOW
2026-10-21 Affected versions changed · Red Hat
2026-10-21 CVSS score added · Red Hat
2026-10-21 Alias added: GHSA-p458-7748-mcp3
2026-10-21 Fix available: npm/@vitest/[email protected], npm/@vitest/[email protected], npm/[email protected] · GHSA-p458-7748-mcp3
2026-10-21 CVSS score added · GHSA-p458-7748-mcp3
2026-10-21 Weakness changed · GHSA-p458-7748-mcp3
2026-10-21 6 new references · GHSA-p458-7748-mcp3

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-112948

Other 5

TI-2026-38677 Vitest: Exposed Browser Mode API Can Proxy CDP and Overwrite Config Files, Leading to RCE CVSS 3.1CRITICAL 9.8
TI-2026-34992 Vitest: Arbitrary file can be read and executed when Vitest UI server is listening CVSS 3.1CRITICAL 9.8
TI-2026-34991 Vitest browser mode serves unsanitized otelCarrier query parameter as inline script CVSS 3.1CRITICAL 9.6
TI-2025-18644 Remote Code Execution when accessing a malicious website while Vitest API server is listening CVSS 3.1CRITICAL 9.7
TI-2025-18643 Browser mode serves arbitrary files in vitest CVSS 3.1HIGH 7.5
TI-2026-76917 Backslash traversal in Vitest mocker exposes files on Windows CVSS 3.1MEDIUM 5.9

See all 9 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences