vulnerability / NVI-00005931 / Revision 4
PhpSpreadsheet has SSRF/RCE in IOFactory::load when $filename is user controlled
OSV carries this publisher advisory for phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet, phpoffice/phpspreadsheet. This is an aggregated source copy; consult the original publisher and compare update dates.
This report has not inspected your inventory, configuration, deployed build, reachability or evidence. A catalog listing and a severity score do not establish exposure or compromise.
01 / Meaning
Why it matters
Published affected context helps an owner decide what evidence to gather. This report has not examined your application.
9.8 CRITICAL (3.1)
nvd@nist.gov severity; no combined Null risk score.
9.2 CRITICAL (4.0)
security-advisories@github.com severity; no combined Null risk score.
0.712%
FIRST EPSS model v2026.06.15; exploitation probability over 30 days, percentile 0.53622. Missing scores are unknown.
As of · FIRST EPSS
02 / Applicability
The affected context
Affected versions, configuration prerequisites and known exclusions are public. Confirm each one against the deployed service.
phpoffice/phpspreadsheet
source listedECOSYSTEM: introduced 4.0.0; fixed 5.6.0
The usage of `is_file`, used to verify if the `$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 of which are shown in the PoC below. This results in a SSRF, at "best", and RCE at worse. This was tested against the `latest` release - but the issue seems to go back a while from a first quick check (still present in `v1.30.2`). ## PoC To reproduce the vulnerable behavior, the following scripts were used: `php.ini` file, only needed to build the malicious phar, not necessary to exploit on a deployed instance of the library: ```ini phar.readonly=0 ``` `make_phar.php` to create the malicious file: ```php data = $d; } function __destruct() { shell_exec($this->data); } } $pop = new GadgetClass('touch /tmp/poc.txt'); $phar = new Phar('exploit.phar'); $phar->startBuffering(); $ph
phpoffice/phpspreadsheet
source listedECOSYSTEM: introduced 3.3.0; fixed 3.10.4
The usage of `is_file`, used to verify if the `$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 of which are shown in the PoC below. This results in a SSRF, at "best", and RCE at worse. This was tested against the `latest` release - but the issue seems to go back a while from a first quick check (still present in `v1.30.2`). ## PoC To reproduce the vulnerable behavior, the following scripts were used: `php.ini` file, only needed to build the malicious phar, not necessary to exploit on a deployed instance of the library: ```ini phar.readonly=0 ``` `make_phar.php` to create the malicious file: ```php data = $d; } function __destruct() { shell_exec($this->data); } } $pop = new GadgetClass('touch /tmp/poc.txt'); $phar = new Phar('exploit.phar'); $phar->startBuffering(); $ph
phpoffice/phpspreadsheet
source listedECOSYSTEM: introduced 2.2.0; fixed 2.4.4
The usage of `is_file`, used to verify if the `$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 of which are shown in the PoC below. This results in a SSRF, at "best", and RCE at worse. This was tested against the `latest` release - but the issue seems to go back a while from a first quick check (still present in `v1.30.2`). ## PoC To reproduce the vulnerable behavior, the following scripts were used: `php.ini` file, only needed to build the malicious phar, not necessary to exploit on a deployed instance of the library: ```ini phar.readonly=0 ``` `make_phar.php` to create the malicious file: ```php data = $d; } function __destruct() { shell_exec($this->data); } } $pop = new GadgetClass('touch /tmp/poc.txt'); $phar = new Phar('exploit.phar'); $phar->startBuffering(); $ph
phpoffice/phpspreadsheet
source listedECOSYSTEM: introduced 2.0.0; fixed 2.1.15
The usage of `is_file`, used to verify if the `$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 of which are shown in the PoC below. This results in a SSRF, at "best", and RCE at worse. This was tested against the `latest` release - but the issue seems to go back a while from a first quick check (still present in `v1.30.2`). ## PoC To reproduce the vulnerable behavior, the following scripts were used: `php.ini` file, only needed to build the malicious phar, not necessary to exploit on a deployed instance of the library: ```ini phar.readonly=0 ``` `make_phar.php` to create the malicious file: ```php data = $d; } function __destruct() { shell_exec($this->data); } } $pop = new GadgetClass('touch /tmp/poc.txt'); $phar = new Phar('exploit.phar'); $phar->startBuffering(); $ph
phpoffice/phpspreadsheet
source listedECOSYSTEM: introduced 0; fixed 1.30.3
The usage of `is_file`, used to verify if the `$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 of which are shown in the PoC below. This results in a SSRF, at "best", and RCE at worse. This was tested against the `latest` release - but the issue seems to go back a while from a first quick check (still present in `v1.30.2`). ## PoC To reproduce the vulnerable behavior, the following scripts were used: `php.ini` file, only needed to build the malicious phar, not necessary to exploit on a deployed instance of the library: ```ini phar.readonly=0 ``` `make_phar.php` to create the malicious file: ```php data = $d; } function __destruct() { shell_exec($this->data); } } $pop = new GadgetClass('touch /tmp/poc.txt'); $phar = new Phar('exploit.phar'); $phar->startBuffering(); $ph
03 / Response
What to do next
- vendor patch
The original advisory lists fixed boundaries 5.6.0 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 3.10.4 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 2.4.4 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 2.1.15 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- vendor patch
The original advisory lists fixed boundaries 1.30.3 for phpoffice/phpspreadsheet. Confirm the publisher’s latest guidance.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. GitHub Advisory Database via OSV
- investigate
Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.
Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system. FIRST EPSS
A fixed release is not deployment evidence.
Check current vendor support and compatibility. After making a change, verify the deployed build and relevant runtime conditions. Keep the evidence, owner and time. An updated lockfile alone does not prove what is running.
04 / Limits
What this report cannot establish
- Customer inventory, deployment, reachability and exploitation have not been inspected.
- NVD lastModified does not establish freshness of every associated CPE record.
05 / Provenance
Sources you can inspect
Each assertion retains its source. Mirrored records may repeat one underlying publisher; additional links are not independent corroboration.
- GHSA-q4q6-r8wh-5cgh ↗
GitHub Advisory Database via OSV · vendor advisory
Observed . GitHub-origin advisory, CC-BY-4.0; OSV is an aggregate copy, not independent corroboration.
- CVE-2026-34084 ↗
NIST National Vulnerability Database · official catalog
Observed . This product uses data from the NVD API but is not endorsed or certified by the NVD.
- CVE-2026-34084 ↗
FIRST EPSS · official catalog
Observed . FIRST EPSS; probability of exploitation in the next 30 days, not local compromise. Dataset date/model retained; FIRST services terms apply.
Public revision history
Only published revisions appear here. Routine fetches do not create a material-change event.
- Revision 4 ·
Source facts changed; compare the preserved prior revision.
- Revision 3 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 2 ·
Dated EPSS estimate updated; this is not a new disclosure or proof of exploitation.
- Revision 1 ·
First indexed by Null; source disclosure date is shown separately.