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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.17%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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
- 8.4 HIGHCVSS: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/M
- EPSS
- 0.17% probability · 7th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-732
- Affected
- filegator/filegator
- Source
- 9119a7d8-5eab-497f-8521-727c672e3725
References
- https://github.com/filegator/filegator/blob/master/CHANGELOG.md#7142---2026-05-18Release Notes
- https://github.com/filegator/filegator/commit/4a44ed9a43f84505703dce669c68fb55270c3f2cPatch
- https://github.com/filegator/filegator/tree/masterProduct
- https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-202-03.jsonVDB Entry
- https://www.cve.org/CVERecord?id=CVE-2026-63358VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.