---
id: "CVE-2026-107053"
kind: "vulnerability"
aliases: ["CVE-2026-107053"]
title: "Librera PDF Reader: insecure permissions let attackers write files outside sandbox"
severity: "unknown"
cvss: null
epss: null
exploited: false
status: "open"
category: "other"
products: []
ecosystems: []
tags: ["android", "librera-pdf-reader", "other"]
not_affected_if: ["no-shared-storage-access", "other-versions"]
published_at: "2026-10-29T17:17:58+00:00"
first_seen_at: "2026-10-29T17:26:16+00:00"
updated_at: "2026-10-29T17:28:05+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-107053", "first_seen_at": "2026-10-29T17:26:16+00:00"}]
---

# Librera PDF Reader: insecure permissions let attackers write files outside sandbox

Librera PDF Reader versionCode 7222 has insecure permissions on shared storage. An attacker can write and truncate files outside the app's sandbox.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Librera PDF Reader version code against `7222` (unknown how to read it from the device or store listing in the sources)

## Timeline

- 2026-10-29T17:26:16+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-107053

## From the sources

Insecure permissions in foobnix Librera PDF Reader versionCode 7222 allows unauthorized attackers to arbitrarily write and truncate files in a shared storage space outside of the sandbox.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_