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CVE-2026-28793

Ssw Tinacms/cli path traversal

8.4 HIGHPublic exploitEPSS 0.21%
  1. Published12 Mar 2026

Description

Tina is a headless content management system. Prior to 2.1.8, the TinaCMS CLI development server exposes media endpoints that are vulnerable to path traversal, allowing attackers to read and write arbitrary files on the filesystem outside the intended media directory. When running tinacms dev, the CLI starts a local HTTP server (default port 4001) exposing endpoints such as /media/list/*, /media/upload/*, and /media/*. These endpoints process user-controlled path segments using decodeURI() and path.join() without validating that the resolved path remains within the configured media directory. This vulnerability is fixed in 2.1.8.

CVSS 3.1 breakdown

Attack vectorLocal
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Ssw Tinacms/cli< 2.1.8

Remediation

Fixed in
Ssw Tinacms/cli≥ 2.1.8

References

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Frequently asked

Is CVE-2026-28793 being actively exploited?

CVE-2026-28793 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.21%.

How severe is CVE-2026-28793?

CVE-2026-28793 has a CVSS 3.1 base score of 8.4, rated high. EPSS estimates a 0.21% probability of exploitation.

Which products are affected by CVE-2026-28793?

Affected products include Ssw Tinacms/cli.

How do I fix CVE-2026-28793?

Upgrade affected software to a fixed version, for example Ssw Tinacms/cli 2.1.8 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-28793 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.