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TI-2026-23211 Aliases CVE-2026-29066GHSA-m48g-4wr2-j2h6

Arbitrary File Read via Disabled Vite Filesystem Restriction in TinaCMS CLI

Priority MEDIUM 61CWE-200Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Fixed

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

Summary

Tina is a headless content management system. Prior to 2.1.8, the TinaCMS CLI dev server configures Vite with server.fs.strict: false, which disables Vite's built-in filesystem access restriction. This allows any unauthenticated attacker who can reach the dev server to read arbitrary files on the host system. This vulnerability is fixed in 2.1.8.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0111 66th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed cli (@tinacms): 2.1.8@tinacms/cli (npm): 2.1.8

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
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

VendorProductAffected versionsFixed inStatusSource
tinacmsclibefore 2.1.82.1.8Patch availableCNA
—@tinacms/cli (npm)before 2.1.82.1.8Patch availableGHSA-m48g-4wr2-j2h6
  • cli Vendortinacms Affected before 2.1.8 Fixed in 2.1.8 Patch available CNA
  • @tinacms/cli (npm) Vendor— Affected before 2.1.8 Fixed in 2.1.8 Patch available GHSA-m48g-4wr2-j2h6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:ssw:tinacms\/cli:*:*:*:*:*:node.js:*:*before 2.1.8Vulnerabletinacms
  • cpe:2.3:a:ssw:tinacms\/cli:*:*:*:*:*:node.js:*:* Versions before 2.1.8 Vulnerable ·tinacms

Remediation

  • Fix · CNA cli (@tinacms) Fixed in 2.1.8
  • Fix · GHSA-m48g-4wr2-j2h6 @tinacms/cli (npm) Fixed in 2.1.8 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-29066
  2. 2026-10-03 Alias added: GHSA-m48g-4wr2-j2h6
  3. 2026-10-25 EPSS moved to the 50th–90th percentile

References

Exploit 1

Advisory 1

Other 1

  • TI-2026-22987 Cross-Origin File Exfiltration via CORS Misconfiguration + Path Traversal in TinaCMS CVSS 3.1CRITICAL 9.7
  • TI-2026-22988 Path Traversal Leading to Arbitrary File Read, Write and Delete in TinaCMS CVSS 3.1HIGH 8.4
  • TI-2026-26850 @tinacms/graphql's Media Endpoints Can Escape the Media Root via Symlinks or Junctions CVSS 3.1HIGH 8.3
  • TI-2026-22986 Path Traversal in Media Upload Handle in Tina CVSS 3.1HIGH 7.4
  • TI-2025-41854 tinacms vulnerable to arbitrary code execution CVSS 4.0HIGH 7.3
  • TI-2023-10626 Sensitive Information leak via Script File in TinaCMS CVSS 3.1HIGH 8.6
See all 7 →

Sources

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