CVE-2026-28791: Tina is a headless content management system

This week

HIGH 7.4REMOTEUPGRADE

CVE-2026-28791 is a high-severity flaw (CVSS 7.4) affecting tinacms\/cli. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Tina is a headless content management system. Prior to 2.1.7, a path traversal vulnerability exists in the TinaCMS development server's media upload handler. The code at media.ts joins user-controlled path segments using path.join() without validating that the resulting path stays within the intended media directory. This allows writing files to arbitrary locations on the filesystem. This vulnerability is fixed in 2.1.7.

Why this priority

High severity
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.4 (High)
Attack vector	Network (remote)
Attack complexity	High
Privileges needed	None
User interaction	None
EPSS exploit chance	0.3% (top 73%)
CISA exploited list	No
Weakness	CWE-22
Published	2026-03-12
Last modified	2026-06-17

Publisher (CNA): GitHub, Inc. · Vendor: ssw

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-03-12 17:16 UTCPublished CVE record published
2026-06-17 10:29 UTCUpdated Record last modified

ssw tinacms\/cli UPGRADE

Affected: < 2.1.7

Fixed in: 2.1.7

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls tinacmscli

2. UPGRADE to 2.1.7

npm install tinacmscli@">=2.1.7"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-28791?

tinacms\/cli: upgrade to 2.1.7. Exact commands for each OS are on this page.

Is CVE-2026-28791 being exploited?

CVE-2026-28791 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-28791 affect?

CVE-2026-28791 affects tinacms\/cli. Severity is high (CVSS 7.4). Tina is a headless content management system. Prior to 2.1.7, a path traversal vulnerability exists in the TinaCMS development server's media upload handler. The code at media.ts joins user-controlled path segments using path.join() without

How urgent is CVE-2026-28791?

Priority 43/100. High severity; Public exploit reference; Remotely exploitable, no login, no user action

Related CVEs

CVE-2026-34603 HIGH 7.1 UPGRADE Tina is a headless content management system
CVE-2026-29066 MEDIUM 6.2 UPGRADE Tina is a headless content management system
CVE-2026-28793 HIGH 8.4 UPGRADE Tina is a headless content management system
CVE-2026-28792 CRITICAL 9.6 UPGRADE Tina is a headless content management system

References

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