CVE-2026-52791CWE-266

CVE-2026-52791

published July 29, 2026

CVSS
2.0
EPSS
0%
Percentile
3.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS
2.0 · NONE
CVSS v4.0
Not supplied
EPSS
0.00145 · 3.5th percentile
Weakness
CWE-266 · Incorrect Privilege Assignment
Published
2026-07-29T21:16Z
References (4)
https://github.com/containers/fuse-overlayfs/commit/97e0d968a782fc259ebde112db1e9b9ff1ad724f · [email protected]https://github.com/containers/fuse-overlayfs/releases/tag/v1.17 · [email protected]https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-v85h · [email protected]https://github.com/containers/fuse-overlayfs/security/advisories/GHSA-2cc4-p72c-v85h · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 29 JUL 16:14Z
    fuse-overlayfs release-1.x preserves SUID/SGID bits after truncate/open(O_TRUNC)
    cvelistv5