How severe is CVE-2026-28791?

CVE-2026-28791 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.

Is CVE-2026-28791 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-28791?

CVE-2026-28791 affects Ssw Tinacms/cli. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-28791?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-28791 have an EU (EUVD) identifier?

Yes. CVE-2026-28791 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11609.

When was CVE-2026-28791 published?

CVE-2026-28791 was published on 2026-03-12 and last updated on 2026-06-17.

CVE-2026-28791

CVE-2026-28791 is a high-severity vulnerability in Ssw Tinacms/cli with a CVSS 3.x base score of 7.4. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.4)
EPSS exploit prediction: 0% (24th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-11609
Weakness: CWE-22
Affected product: Ssw Tinacms/cli
Published: 2026-03-12
Last modified: 2026-06-17

Description

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.

Frequently asked questions

What is CVE-2026-28791?: 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.
How severe is CVE-2026-28791?: CVE-2026-28791 has a CVSS 3.x base score of 7.4, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability high.
Is CVE-2026-28791 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (24th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-28791?: CVE-2026-28791 affects Ssw Tinacms/cli. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-28791?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-28791 have an EU (EUVD) identifier?: Yes. CVE-2026-28791 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11609.
When was CVE-2026-28791 published?: CVE-2026-28791 was published on 2026-03-12 and last updated on 2026-06-17.

References

https://github.com/tinacms/tinacms/security/advisories/GHSA-5hxf-c7j4-279c

Affected products (1)

cpe:2.3:a:ssw:tinacms\/cli:*:*:*:*:*:node.js:*:*

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