# CVE-2026-18648: Blix Email Blue Mail Calendar App react-native-receive-sharing-intent FileDirectory.getFileFromUri path traversal

> Local attackers can exploit path traversal in the react-native-receive-sharing-intent component to read or modify files via manipulated display names.

- **Severity:** Medium 4.8 (`CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 3 Aug 2026
- **Updated:** 5 Aug 2026
- **Also known as:** GHSA-fmx4-2vwr-8cfw

## What is CVE-2026-18648?

CVE-2026-18648 is a medium-severity path traversal vulnerability in Blix Email Blue Mail Calendar App, published on 3 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

A vulnerability was detected in Blix Email Blue Mail Calendar App 2.2.305. Impacted is the function FileDirectory.getDataColumn/FileDirectory.getFileFromUri of the component react-native-receive-sharing-intent. The manipulation of the argument _display_name results in path traversal. The attack is only possible with local access. The exploit is now public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-22 (Improper Limitation of a Pathname to a Restricted Directory)

## Which versions are affected by CVE-2026-18648?


## How do I fix CVE-2026-18648?

No fix has been published for CVE-2026-18648 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-18648 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18648 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-18648 and fix it if it is affected.

What it is: CVE-2026-18648 is a medium-severity path traversal vulnerability in Blix Email Blue Mail Calendar App, published on 3 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-18648 exists.

Affected product: Blix Email Blue Mail Calendar App. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-18648/ (Markdown: https://insights.sbomify.com/CVE-2026-18648/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-18648
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-18648
- OSV: https://osv.dev/vulnerability/CVE-2026-18648

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-18648/
Summaries are generated and may contain mistakes; the official description above is the record.