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...

PHPSpreadsheet: SSRF bypass via HTTP redirect in WEBSERVICE() domain whitelist

Summary The domain whitelist introduced in PhpSpreadsheet 5.4.0 for the WEBSERVICE formula function can be bypassed via HTTP redirect. The whitelist validates only the initial URL's hostname, but filegetcontents follows 302/301 redirects by default without re-validating the redirect target agains...

Server-side Request Forgery (SSRF)

Overview phpoffice/phpspreadsheet is a Spreadsheet engine that Read, Create and Write Spreadsheet documents in PHP . Affected versions of this package are vulnerable to Server-side Request Forgery SSRF in the webService process. An attacker can access internal services and exfiltrate sensitive da...

The vulnerability of the OLERead::read() function in the src/PhpSpreadsheet/Shared/OLERead.php script of the PhpSpreadsheet library allows a hacker to trigger a service failure.

The vulnerability of the OLERead::read function in the src/PhpSpreadsheet/Shared/OLERead.php script of the PhpSpreadsheet library is related to the execution of a loop with an unavailable exit condition. Exploiting this vulnerability could allow a remote attacker to cause service interruptions...

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...

The vulnerability of the webService() method in the Calculation/Web/Service.php PHP library allows a attacker to perform an SSRF attack.

The vulnerability of the webService method in the Calculation/Web/Service.php PHP library of the PhpSpreadsheet framework is related to insufficient validation of requests on the server side. Exploiting this vulnerability could allow a malicious actor to perform an SSRF attack remotely...

PT-2026-63656

Name of the Vulnerable Software and Affected Versions PhpSpreadsheet affected versions not specified Description The OLE reader in PhpSpreadsheet follows sector chains from XLS/OLE metadata without detecting cycles or enforcing a maximum chain length. A malformed file can set the small-block depo...

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...

PT-2026-63655

Name of the Vulnerable Software and Affected Versions PhpSpreadsheet versions 4.0.0 through 5.8.0 PhpSpreadsheet versions 3.3.0 through 3.10.6 PhpSpreadsheet versions 2.2.0 through 2.4.6 PhpSpreadsheet versions 2.0.0 through 2.1.17 PhpSpreadsheet versions prior to 1.30.6 Description Insufficient...

📄 PHPSpreadsheet 5.8.0 Remote Code Execution

PHPSpreadsheet version 5.8.0 suffers from a phar deserialization remote code execution vulnerability. ================================================================================================================================== | Title : PHPSpreadsheet 5.8.0 Phar Deserialization RCE | | Auth...

Deserialization of Untrusted Data

Overview phpoffice/phpspreadsheet is a Spreadsheet engine that Read, Create and Write Spreadsheet documents in PHP . Affected versions of this package are vulnerable to Deserialization of Untrusted Data in the File::prohibitWrappers function. An attacker can execute arbitrary code or read files b...

CVE-2026-45034

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 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

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...

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...

EUVD-2026-38359

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...

Improper Input Validation

phpoffice/phpspreadsheet is vulnerable to Improper Input Validation. The vulnerability is due to insufficient validation of PHP stream wrappers, where the wrapper check can be bypassed using malformed phar:/// paths, which allows an attacker to exploit the phar stream wrapper to bypass security...

Exploit for CVE-2026-45034

🧨 PHPSpreadsheet Phar Deserialization Exploit Bypass pro...

GHSA-87M4-826X-3CRX PHPSpreadsheet has a patch bypass for CVE-2026-34084

Summary 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 phar://, php://, data:// or expect://. The check is not equivalent to "does the path conta...