TinaCMS admin preview iframe loads an attacker-controlled origin from the URL fragment
High-risk advisory
CVE-2026-108261
Summary
TinaCMS admin preview iframe loads an attacker-controlled origin from the URL fragment
Why it matters
GitHub has published a reviewed security advisory for tinacms. Prioritize it with other application dependency updates, especially because EPSS places it in the 5% percentile.
Operator check
Check whether tinacms is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.2%; percentile: 5%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.