---
id: CVE-2026-52791
title: >-
  fuse-overlayfs is an implementation of overlayfs in FUSE for rootless
  containers
summary: >-
  fuse-overlayfs is an implementation of overlayfs in FUSE for rootless
  containers. Prior to 1.17, the release-1.x C branch preserves SUID and SGID
  mode bits in main.c during open(O_TRUNC) and truncate handling on a copied-up
  file, allowin…
severity: none
cwe:
  - CWE-266
published: '2026-07-29'
updated: '2026-09-10'
sourceUpdated: '2026-09-10T20:04:54.367'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52791'
references:
  - url: >-
      https://github.com/containers/fuse-overlayfs/commit/97e0d968a782fc259ebde112db1e9b9ff1ad724f
    label: security-advisories@github.com
  - url: 'https://github.com/containers/fuse-overlayfs/releases/tag/v1.17'
    label: security-advisories@github.com
  - url: >-
      https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-v85h
    label: security-advisories@github.com
  - url: >-
      https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-v85h
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00145
epssPercentile: 0.0313
ingestedAt: '2026-09-10T21:05:53.588Z'
---

## Overview

fuse-overlayfs is an implementation of overlayfs in FUSE for rootless containers. Prior to 1.17, the release-1.x C branch preserves SUID and SGID mode bits in main.c during open(O_TRUNC) and truncate handling on a copied-up file, allowing a low-privileged process to leave the upper-layer file with mode 4777. This issue is fixed in version 1.17.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.