Path traversal in FacturaScripts - CVE-2026-77526
Published: November 9, 2026
Vulnerability identifier: #VU163109
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-77526
CWE-ID: CWE-22
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows an authenticated attacker to write arbitrary files outside MyFiles/ in FacturaScripts.
The vulnerability exists due to missing path normalization in UploadedFile::move() when processing uploaded filenames containing traversal segments. An authenticated attacker can use upload permissions to place files in web-server-writable directories and execute code as the web-server user on Apache deployments that directly serve those directories and permit uploaded .htaccess overrides.
Affected software
FacturaScripts
How to mitigate CVE-2026-77526
Install security update from vendor's website.
FacturaScripts - update to 2026.3