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...

Fedora 43 : composer (2026-4308b5fc39)

The remote Fedora 43 host has a package installed that is affected by a vulnerability as referenced in the FEDORA-2026-4308b5fc39 advisory. Version 2.10.1 - 2026-06-04 Security: Fixed shell escaping when opening an editor 12903 Security: Verify backup phar signature before restoring it when using...

Exploit for CVE-2026-45034

🧨 PHPSpreadsheet Phar Deserialization Exploit Bypass pro...

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...

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...

PHANTOM_CTF_HACKINGCLUB_BY_BSIDESRECIFE

Phantom — CTF Writeup & Exploit HackingClub / BSides Recife...

PT-2026-47606

Name of the Vulnerable Software and Affected Versions PhpSpreadsheet versions prior to 1.30.5 Description An issue exists in the File::prohibitWrappers function where the use of parse url to detect stream wrappers can be bypassed. When an input contains three or more slashes after the scheme e.g....

CVE-2026-25524

Magento Long Term Support LTS is an unofficial, community-driven project provides an alternative to the Magento Community Edition e-commerce platform with a high level of backward compatibility. Prior to version 20.17.0, PHP functions such as getimagesize, fileexists, and isreadable can trigger...

CVE-2026-34084

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.2 and earlier, 2.0.0 through 2.1.14, 2.2.0 through 2.4.3, 3.3.0 through 3.10.3, and 4.0.0 through 5.5.0, when the filename argument to IOFactory::load is user-controlled, an attacker can supply a PHP stream...

CLSA-2026-1779212665 php: Fix of 14 CVEs

CVE-2018-5711: fix infinite loop in gdImageCreateFromGifCtx - CVE-2018-5712: remove file name from phar stub error output XSS - CVE-2018-10545: do not set PRSETDUMPABLE in php-fpm workers by default - CVE-2018-10546: fail iconvmimedecode on invalid multibyte sequences - CVE-2018-10547: escape...

Server-Side Request Forgery (SSRF)

PhpSpreadsheet is vulnerable to Server-Side Request Forgery SSRF. The vulnerability is due to insufficient validation of user-controlled filenames passed to IOFactory::load, which allows an attacker to supply malicious PHP stream wrapper paths such as phar:// to trigger PHAR deserialization and...

CVE-2026-34084

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.2 and earlier, 2.0.0 through 2.1.14, 2.2.0 through 2.4.3, 3.3.0 through 3.10.3, and 4.0.0 through 5.5.0, when the filename argument to IOFactory::load is user-controlled, an attacker can supply a PHP stream...

CVE-2026-34084

CVE-2026-34084 describes a vulnerability in PhpSpreadsheet where IOFactory::load() with a user-controlled filename can pass PHP stream wrappers (phar://, ftp://, ssh2.sftp://) to is_file(), triggering PHAR deserialization and potential remote code execution if an appropriate gadget chain exists. ...

CVE-2026-34084 PhpSpreadsheet SSRF and RCE via PHP stream wrappers in IOFactory::load

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.2 and earlier, 2.0.0 through 2.1.14, 2.2.0 through 2.4.3, 3.3.0 through 3.10.3, and 4.0.0 through 5.5.0, when the filename argument to IOFactory::load is user-controlled, an attacker can supply a PHP stream...

CLSA-2026-1777946242 php: Fix of 13 CVEs

CVE-2018-14883: fix int overflow leading to heap overflow in exifthumbnailextract - CVE-2019-6977: fix imagecolormatch out-of-bounds write on heap in GD - CVE-2019-9022: fix memcpy with negative length via crafted DNS response - CVE-2019-9640: fix invalid read in exifprocessSOFn - CVE-2019-11042:...

CVE-2026-34084: Deserialization of Untrusted Data

PhpSpreadsheet is a library for reading and writing spreadsheet files. In versions 1.30.2 and earlier, 2.0.0 through 2.1.14, 2.2.0 through 2.4.3, 3.3.0 through 3.10.3, and 4.0.0 through 5.5.0, when the filename argument to IOFactory::load is user-controlled, an attacker can supply a PHP stream...

CLSA-2026-1777540774 php: Fix of 4 CVEs

CVE-2018-14883: fix integer overflow leading to heap buffer overflow in exifthumbnailextract - CVE-2019-19246: fix heap buffer overflow in oniguruma strlowercasematch - CVE-2018-19518: disable imap rsh/ssh by default to prevent argument injection imap.enableinsecurersh INI added - CVE-2018-20783:...

php: Fix of 4 CVEs

CVE-2018-14883: fix integer overflow leading to heap buffer overflow in exifthumbnailextract - CVE-2019-19246: fix heap buffer overflow in oniguruma strlowercasematch - CVE-2018-19518: disable imap rsh/ssh by default to prevent argument injection imap.enableinsecurersh INI added - CVE-2018-20783:...

PhpSpreadsheet has SSRF/RCE in IOFactory::load when $filename is user controlled

The usage of isfile, used to verify if the $filename is indeed an actual file, by all? Reader implementations inside the helper function File::assertFile is php-wrapper aware, for any php wrappers implementing stat. The 3 wrappers ftp://, phar:// and ssh2.sftp://, all satisfy this requirement - 2...

GHSA-Q4Q6-R8WH-5CGH PhpSpreadsheet has SSRF/RCE in IOFactory::load when $filename is user controlled

The usage of isfile, used to verify if the $filename is indeed an actual file, by all? Reader implementations inside the helper function File::assertFile is php-wrapper aware, for any php wrappers implementing stat. The 3 wrappers ftp://, phar:// and ssh2.sftp://, all satisfy this requirement - 2...