Arbitrary File Read via Disabled Vite Filesystem Restriction in TinaCMS CLI

published 2026-03-12 7 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-11615 , GHSA-m48g-4wr2-j2h6

cvss: 6.2; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 1.1%; EPSS 1.1% chance of exploitation in 30 days, percentile 66%
public exploits: 0; none known, plus a Nuclei check

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.

Patch / fix

fixed in 4

npm @tinacms/cli 2.1.8
ssw tinacms/cli 2.1.8
tina @tinacms/cli 2.1.8
tinacms cli 2.1.8

CISA SSVC

Exploitation: Proof of concept is public
Automatable: no
Technical impact: partial
Assessed: 7 mo ago (2026-03-13)

Exploit prediction

1.11% chance of exploitation in the next 30 days, higher than 66% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

Nuclei template TinaCMS - Path Traversal nuclei detection template
github.com https://github.com/tinacms/tinacms/security/advisories/GHSA-m48g-4wr2-j2h6 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.2	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
GitHub	3.1	6.2	CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected packages

ecosystem	package	affected	fixed in
npm	@tinacms/cli	<2.1.8	2.1.8

Affected products

@tinacms cli

Classification

Weakness

CWE-552 Files or Directories Accessible to External Parties
CWE-200 Exposure of Sensitive Information to an Unauthorized Actor

References

github.com /tinacms/tinacms/security/advisories/GHSA-m48g-4wr2-j2h6
exploit, web, vendor-advisory
nvd.nist.gov /vuln/detail/CVE-2026-29066
advisory
github.com /tinacms/tinacms
package

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.

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

Summary