High 8.2Published Oct 9, 2026

CVE-2026-108259Tina: Code injection via unescaped Git branch name in generated client source

Updated under an hour ago (Oct 28, 2026, 7:40 AM ET)

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It affects tinacms and 1 other product. Add what you run to find out whether that includes you.

EPSS puts the chance of exploitation in the next 30 days at 0.25%, higher than 16% of scored CVEs.

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Exploited in the last 30 days

Tina is a headless content management system. Prior to 3.0.0, @tinacms/cli reads Git branch values from VERCEL_GIT_COMMIT_REF, GITHUB_BRANCH, or HEAD, incorporates the raw value into the API URL, and interpolates that URL into JavaScript string literals in packages/@tinacms/cli/src/next/codegen/index.ts and packages/@tinacms/cli/src/next/codegen/codegen/plugin.ts. A crafted Git-valid branch name containing a quote can terminate the generated string and inject an expression that executes when the generated client module is imported during a preview build. The injected code runs with the build process privileges and can read environment credentials, modify deployment artifacts, or make network requests. This issue is fixed in version 3.0.0.

CVSS: 8.2 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Weakness (CWE): CWE-94
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): 0.25% (percentile 16)
Assigned by: GitHub_M
NVD analysis: Deferred
Record last updated: Oct 13, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

tinacms tinacms tinacms:tinacms (from the name)	before 3.0.0	CNA record
@tinacms cli tinacms:cli (from the name)	before 3.0.0	CNA record

References

References

https://github.com/tinacms/tinacms/security/advisories/GHSA-pwhx-cvv3-qj5c	x-refsource-confirm
https://github.com/tinacms/tinacms/pull/7526	x-refsource-misc
https://github.com/tinacms/tinacms/commit/d030d414d39e15de79bf36e4c728d57205e71dde	x-refsource-misc
https://github.com/tinacms/tinacms/releases/tag/@tinacms/cli@3.0.0	x-refsource-misc

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.