CVE-2026-28793
CVE-2026-28793 is a high-severity vulnerability in Ssw Tinacms/cli with a CVSS 3.x base score of 8.4. 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 8.4)
- EPSS exploit prediction: 0% (10th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2026-11613
- Weakness: CWE-22
- Affected product: Ssw Tinacms/cli
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-28793?
- 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.
- How severe is CVE-2026-28793?
- CVE-2026-28793 has a CVSS 3.x base score of 8.4, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-28793 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (10th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-28793?
- CVE-2026-28793 affects Ssw Tinacms/cli. See the affected-products list for the exact vulnerable versions.
- How do I fix CVE-2026-28793?
- 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-2026-28793 have an EU (EUVD) identifier?
- Yes. CVE-2026-28793 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-11613.
- When was CVE-2026-28793 published?
- CVE-2026-28793 was published on 2026-03-12 and last updated on 2026-06-17.
References
Affected products (1)
- cpe:2.3:a:ssw:tinacms\/cli:*:*:*:*:*:node.js:*:*
More vulnerabilities in Ssw Tinacms/cli
- CVE-2026-28792 — Critical (CVSS 9.6): Tina is a headless content management system. Prior to 2.1.8 , the TinaCMS CLI dev server combines a permissive CORS…
- CVE-2025-68278 — High (CVSS 8.8): Tina is a headless content management system. In tinacms prior to version 3.1.1, tinacms uses the gray-matter package…
- CVE-2023-25164 — High (CVSS 8.6): Tinacms is a Git-backed headless content management system with support for visual editing. Sites being built with…
- CVE-2024-45391 — High (CVSS 7.5): Tina is an open-source content management system (CMS). Sites building with Tina CMS's command line interface (CLI)…
- CVE-2026-28791 — High (CVSS 7.4): Tina is a headless content management system. Prior to 2.1.7, a path traversal vulnerability exists in the TinaCMS…
- CVE-2026-34603 — High (CVSS 7.1): Tina is a headless content management system. Prior to version 2.2.2, @tinacms/cli recently added lexical…
All CVEs affecting Ssw Tinacms/cli →
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