Vulnerability DatabaseCVE-2026-52791
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CVE-2026-52791
Published:July 29, 2026
Updated:August 04, 2026
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.
Affected Packages
https://github.com/containers/fuse-overlayfs.git (GITHUB):
Affected version(s) >=v0.2 <v1.17
Fix Suggestion:
Update to version v1.17
Related Resources (5)
https://nvd.nist.gov/vuln/detail/CVE-2026-52791
https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-v85h
https://github.com/containers/fuse-overlayfs/commit/97e0d968a782fc259ebde112db1e9b9ff1ad724f
https://github.com/containers/fuse-overlayfs/releases/tag/v1.17
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52791.json
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CVSS v4
Base Score:
2
Attack Vector
LOCAL
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
NONE
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
NONE
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
3.3
Attack Vector
LOCAL
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Incorrect Privilege Assignment
CWE-266
EPSS
Base Score:
0.10