CVE-2026-59932

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory an...

CVE-2026-59932 PhpSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory an...

CVE-2026-59932

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory an...

EUVD-2026-49952

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory an...

CVE-2026-59932

CVE-2026-59932 concerns PhpSpreadsheet’s Gnumeric reader. The issue arises when reading attacker-supplied .gnumeric files: if the file starts with gzip magic bytes, the reader decodes the full compressed content via gzdecode() without a decompressed-size cap, which can cause memory exhaustion and...

CVE-2026-59932 PhpSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory an...

CVE-2026-59932 PhpSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory an...

CVE-2026-59932: Uncontrolled Resource Consumption

PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. In versions 4.0.0 through 5.8.0, 3.3.0 through 3.10.6, 2.2.0 through 2.4.6, 2.0.0 through 2.1.17, and all releases up to and including 1.30.5, the Gnumeric reader reads attacker-supplied .gnumeric files into memory an...

Uncontrolled Resource Consumption

phpoffice/phpspreadsheet is vulnerable to Uncontrolled Resource Consumption. The vulnerability is due to the Gnumeric reader calling gzdecode on attacker-supplied compressed .gnumeric files without enforcing a decompressed-size limit, which allows an attacker to upload a specially crafted...

PHPSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion

Summary PhpSpreadsheet's Gnumeric reader reads attacker-supplied .gnumeric files into memory and, when the file starts with gzip magic bytes, calls gzdecode on the full compressed contents without enforcing a decompressed-size limit. A very small compressed .gnumeric file can expand to data large...

GHSA-2MRG-GJXQ-2GVR PHPSpreadsheet: Gnumeric reader unbounded gzip expansion causes memory exhaustion

Summary PhpSpreadsheet's Gnumeric reader reads attacker-supplied .gnumeric files into memory and, when the file starts with gzip magic bytes, calls gzdecode on the full compressed contents without enforcing a decompressed-size limit. A very small compressed .gnumeric file can expand to data large...

The vulnerability of the gzfileGetContents() method in the src/PhpSpreadsheet/Reader/Gnumeric.php script of the PhpSpreadsheet library allows a attacker to cause a service failure.

The vulnerability of the gzfileGetContents method in the src/PhpSpreadsheet/Reader/Gnumeric.php script of the PhpSpreadsheet library is related to incorrect processing of highly compressed input data. Exploiting this vulnerability could allow an attacker to cause a service failure...

PT-2026-63654

Name of the Vulnerable Software and Affected Versions PhpSpreadsheet affected versions not specified Description An issue exists in the Gnumeric reader where the gzfileGetContents function in src/PhpSpreadsheet/Reader/Gnumeric.php incorrectly handles highly compressed input data. When a .gnumeric...