CVE-2026-127209
Xiaomi Mi Browser < 14.66.0 Path Traversal via ThirdDocViewerActivity
Description
Xiaomi Mi Browser Android Application (com.mi.globalbrowser) before 14.66.0-gn contains a path traversal vulnerability in the exported ThirdDocViewerActivity component, where CopyExternalFile.copyFromUri() copies content provider streams using an unsanitized filename from the _display_name column without basename reduction or canonical-path checks. A zero-permission co-resident malicious application can supply a crafted content provider with a _display_name containing .. sequences to make the browser write attacker-controlled bytes to an arbitrary path within its external storage directory, escaping the intended cache_docs staging location without requiring user interaction.
INFO
Published Date :
Nov. 12, 2026, 9:18 p.m.
Last Modified :
Nov. 12, 2026, 9:18 p.m.
Remotely Exploit :
No
Source :
VulnCheck
Affected Products
The following products are affected by CVE-2026-127209
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 | ||||
| CVSS 3.1 | MEDIUM | MITRE-CVE | ||||
| CVSS 4.0 | MEDIUM | 83251b91-4cc7-4094-a5c7-464a1b83ea10 |
Solution
- Update Xiaomi Mi Browser to version 14.66.0-gn or later.
- Apply security patches for the Android application.
- Review file handling for unsanitized input.
- Implement basename reduction and canonical-path checks.
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CVE-2026-127209 vulnerability anywhere in the article.