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Vulnerability record · CVE-2026-63358 · published 21 July 2026

CVE-2026-63358: Filegator incorrect permission assignment vulnerability

Filegator · Filegator

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.

8.4 CVSS 4.0 High EPSS 0.17% · top 94.5% CWE-732 · Incorrect permission assignment
8.4CVSS 4.0 base score
0.17%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
5References
5 Aug 2026Last modified by NVD

Description

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.

CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/filegator/filegator/blob/master/CHANGELOG.md#7142---2026-05-18 Release Notes
https://github.com/filegator/filegator/commit/4a44ed9a43f84505703dce669c68fb55270c3f2c Patch
https://github.com/filegator/filegator/tree/master Product
https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-202-03.json VDB Entry
https://www.cve.org/CVERecord?id=CVE-2026-63358 VDB Entry

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-63358), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.