What is CVE-2026-63358?

CVE-2026-63358 is a high-severity vulnerability in Filegator, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.3/10. Published 2026-07-21.

How severe is CVE-2026-63358?

High severity. CVSS v3 base score is 7.3 out of 10.

Vulnerability in Filegator

CVE-2026-63358

FileGator accepts arbitrary Unix permission values via the '/chmoditems' API endpoint and passes the value directly to PHP's native 'chmod()' function through 'octdec()' conversion, with no validation. This allows an authenticated user with 'chmod' permission to upgrade their privileges to root.

Published 2026-07-21 · last modified 2026-08-05.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:L.

EPSS exploit prediction

EPSS: 0.005 (42.6th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 43rd percentile — 42.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.005 · change: +0.003

Affected products

Filegator — versions 0, 7.14.2

Weakness classification (CWE)

CWE-732 — Incorrect Permission Assignment for Critical Resource

References

9119a7d8-5eab-497f-8521-727c672e3725 (release-notes, Release Notes)
9119a7d8-5eab-497f-8521-727c672e3725 (Patch, patch)
9119a7d8-5eab-497f-8521-727c672e3725 (Product, product)
9119a7d8-5eab-497f-8521-727c672e3725 (VDB Entry, vdb-entry)
9119a7d8-5eab-497f-8521-727c672e3725 (VDB Entry, third-party-advisory)

Frequently asked questions

What is CVE-2026-63358?: CVE-2026-63358 is a high-severity vulnerability in Filegator, classified under Incorrect Permission Assignment for Critical Resource. CVSS score: 7.3/10. Published 2026-07-21.
How severe is CVE-2026-63358?: High severity. CVSS v3 base score is 7.3 out of 10.