CVE-2026-45034 PhpSpreadsheet: File::prohibitWrappers bypass

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.5, CVE-2026-34084 was patched by the helper File::prohibitWrappers. The helper calls parseurl$filename, PHPURLSCHEME and then checks isstring$scheme && strlen$scheme 1 to reject stream wrappers such as...

CVE-2026-45034

Summary: PhpSpreadsheet before 1.30.5 contains a bypass in File::prohibitWrappers that can be exploited via phar:// wrapper paths (e.g., phar:///path/file.phar/inner). When input contains three or more slashes after the scheme, parse_url can return false, skipping the check and allowing phar wrap...