CVE-2026-34603

Description

Tina is a headless content management system. Prior to version 2.2.2, @tinacms/cli recently added lexical path-traversal checks to the dev media routes, but the implementation still validates only the path string and does not resolve symlink or junction targets. If a link already exists under the media root, Tina accepts a path like pivot/written-from-media.txt as "inside" the media directory and then performs real filesystem operations through that link target. This allows out-of-root media listing and write access, and the same root cause also affects delete. This issue has been patched in version 2.2.2.

Weakness classification

• CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
• CWE-59: Improper Link Resolution Before File Access ('Link Following')

Primary references

• security-advisories@github.com — Patch
• security-advisories@github.com — Vendor Advisory
• 134c704f-9b21-4f2e-91b3-4a467353bcc0 — Vendor Advisory