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VulnerabilityPublished

CVE-2026-29066: @tinacms cli · Exposed Files or Directories

Affects @tinacms cliSource CVE Database V5

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Not known to be exploited · public detection template (Nuclei) · CVSS 6.2 Medium : upgrade to 2.1.8 when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
6.2Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
1.0% chance of exploitation in 30 days – higher than 64% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 2.1.8
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 12 Mar 2026

  2. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  3. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  4. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

What to do

Upgrade cli and @tinacms/cli to 2.1.8.

Affected software

ProductAffectedFixed in
@tinacmscliAffected
  • <2.1.8
Fixed in
  • 2.1.8
npm@tinacms/clipkg:npm/@tinacms/cliOther threatsAffected
  • <2.1.8
Fixed in
  • 2.1.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

  1. Upgrade the TinaCMS CLI to version 2.1.8 or later, which restores Vite's filesystem access restrictions and fixes the vulnerability.
  2. Restrict network access to development servers running TinaCMS CLI to trusted internal networks only; avoid exposing dev servers to public or untrusted networks.
  3. Use firewall rules or VPNs to limit access to development environments.
  4. Regularly audit development environment configurations to ensure that filesystem access restrictions are enabled and that no unintended services are exposed.
  5. Educate developers about the risks of exposing dev servers and encourage use of secure development practices, including running dev servers on localhost or isolated environments.
  6. Monitor network traffic and logs for unusual access patterns to dev servers that could indicate exploitation attempts.
  7. If upgrading immediately is not feasible, consider manually configuring Vite's server.fs.strict option to true in the dev server configuration as a temporary workaround.

Description

CVE-2026-29066 is a medium-severity vulnerability in the @tinacms CLI prior to version 2.1.8. The issue arises because the TinaCMS CLI dev server disables Vite's filesystem access restrictions by setting server.fs.strict to false. This misconfiguration allows any unauthenticated attacker who can reach the development server to read arbitrary files on the host system. The vulnerability impacts confidentiality but does not affect integrity or availability. It requires network access to the dev server but no authentication or user interaction. The flaw is fixed in version 2.

References

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