PHPOffice/PhpSpreadsheet · error · PhpOffice\PhpSpreadsheet\Reader\Exception

EBCDIC encoding not permitted

Error message

EBCDIC encoding not permitted

What it means

Error "EBCDIC encoding not permitted" thrown in PHPOffice/PhpSpreadsheet.

Source

Thrown at src/PhpSpreadsheet/Reader/Security/XmlScanner.php:68

            $foundUtf7 = $foundUtf7 || (preg_match(self::ENCODING_UTF7, $xml) === 1);
            $xml = preg_replace(self::ENCODING_PATTERN, '', $xml) ?? $xml;
        } else {
            $foundUtf7 = $foundUtf7 || (preg_match(self::ENCODING_UTF7, $xml) === 1);
        }
        if ($foundUtf7) {
            throw new Reader\Exception('UTF-7 encoding not permitted');
        }
        if (substr($xml, 0, Reader\Csv::UTF8_BOM_LEN) === Reader\Csv::UTF8_BOM) {
            $xml = substr($xml, Reader\Csv::UTF8_BOM_LEN);
        }

        return $xml;
    }

    private function findCharSet(string $xml): string
    {
        if (str_starts_with($xml, "\x4c\x6f\xa7\x94")) {
            throw new Reader\Exception('EBCDIC encoding not permitted');
        }
        $encoding = Reader\Csv::guessEncodingBom('', $xml);
        if ($encoding !== '') {
            return $encoding;
        }
        $xml = str_replace("\0", '', $xml);
        if (preg_match(self::ENCODING_PATTERN, $xml, $matches)) {
            return strtoupper($matches[2]);
        }

        return 'UTF-8';
    }

    /**
     * Scan the XML for use of <!ENTITY to prevent XXE/XEE attacks.
     *
     * @param false|string $xml
     */

View on GitHub (pinned to 65b080eef4)

When it happens

Trigger: Thrown at src/PhpSpreadsheet/Reader/Security/XmlScanner.php:68 when the library encounters an invalid state.

Common situations: See trigger scenarios.

AI-assisted analysis of PHPOffice/PhpSpreadsheet@65b080eef4 (2026-08-17). Data as JSON: /api/errors/bc6e67caaf817784. Report an issue: GitHub.