---
title: "CVE-2026-46695: BoxLite: Permission Bypass Allows Modification of Read-Only Files"
url: https://erroneo.us/security/cve/CVE-2026-46695/
description: "CVE-2026-46695 (boxlite (PyPI)): Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-10
date_modified: 2026-06-23
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-46695"
kev: false
cvss: 10
epss: 0.00479
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-46695: BoxLite: Permission Bypass Allows Modification of Read-Only Files

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.5% , percentile 40: FIRST’s model estimates a 0.5% chance of exploitation activity in the next 30 days, higher than 40% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes boxlite (PyPI) < 0.9.0, fixed in 0.9.0 ; @boxlite-ai/boxlite (npm) < 0.9.0, fixed in 0.9.0 ; github.com/boxlite-ai/boxlite/sdks/go (Go) < 0.9.0, fixed in 0.9.0 ; boxlite (crates.io (Rust)) < 0.9.0, fixed in 0.9.0 . Check your lockfile, including transitive dependencies.

## What it is

Boxlite is a sandbox service that allows users to create lightweight virtual machines (Boxes) and launch OCI containers within them to run untrusted code. Prior to version 0.9.0, Boxlite does not restrict the kernel capabilities available inside the container, malicious code can remount the directory in rw mode, thereby gaining write access to that directory. This allows malicious code to perform arbitrary write operations on directories that should be read-only. This issue has been patched in version 0.9.0.

## Affected packages

- PyPI `boxlite` < 0.9.0 → fixed: 0.9.0
- npm `@boxlite-ai/boxlite` < 0.9.0 → fixed: 0.9.0
- Go `github.com/boxlite-ai/boxlite/sdks/go` < 0.9.0 → fixed: 0.9.0
- crates.io (Rust) `boxlite` < 0.9.0 → fixed: 0.9.0
- crates.io (Rust) `boxlite-cli` < 0.9.0 → fixed: 0.9.0

## Affected products (CVE record)

- boxlite-ai boxlite: < 0.9.0

## Severity

- GitHub_M CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N`
- GitHub CVSS 3.1: 10.0 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.48% probability of exploitation activity in the next 30 days; percentile 40.

## Sources

- [GitHub Advisory GHSA-g6ww-w5j2-r7x3](https://github.com/advisories/GHSA-g6ww-w5j2-r7x3)
- [CVE.org record CVE-2026-46695](https://www.cve.org/CVERecord?id=CVE-2026-46695)
- [NVD entry CVE-2026-46695](https://nvd.nist.gov/vuln/detail/CVE-2026-46695)
- [github.com](https://github.com/boxlite-ai/boxlite/security/advisories/GHSA-g6ww-w5j2-r7x3)
- [github.com](https://github.com/boxlite-ai/boxlite/pull/454)
- [github.com](https://github.com/boxlite-ai/boxlite/releases/tag/v0.9.0)
- [rustsec.org](https://rustsec.org/advisories/RUSTSEC-2026-0147.html)

---
Source page: https://erroneo.us/security/cve/CVE-2026-46695/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt