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© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-34084

41
FAUCET Score

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 wrapper path (such as phar://, ftp://, or ssh2.sftp://) that passes the is_file() check in File::assertFile(). The phar:// wrapper triggers deserialization of the PHAR metadata, which can lead to remote code execution if a suitable gadget chain is available in the application. The ftp:// and ssh2.sftp:// wrappers can be used for server-side request forgery. This issue has been fixed in versions 1.30.3, 2.1.15, 2.4.4, 3.10.4, and 5.6.0.

First published: May 5, 2026Last modified: May 5, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 1.30.3CPE matchmatch criteria
cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*
>= 2.0.0, < 2.1.15CPE matchmatch criteria
cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*
>= 2.2.0, < 2.4.4CPE matchmatch criteria
cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*
>= 3.3.0, < 3.10.4CPE matchmatch criteria
cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*
>= 4.0.0, < 5.6.0CPE matchmatch criteria
cpe:2.3:a:phpoffice:phpspreadsheet:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 4.0

9.2CRITICAL

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
PRESENT
Privileges Required
NONE
User Interaction
NONE
VS Confidentiality
HIGH
VS Integrity
HIGH
VS Availability
HIGH
SS Confidentiality
NONE
SS Integrity
NONE
SS Availability
NONE
Exploit Maturity
NOT_DEFINED
CvssVersion
4.0

Exploit Intelligence

EPSS Score
0.71%
Probability of exploitation in next 30 days
EPSS Percentile
49.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0071 is in the 32nd percentile among its peer group of 36,835 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (6)

composerpatch availablevia ghsa
Product: phpoffice/phpspreadsheetFixed in: 5.6.0
composerpatch availablevia ghsa
Product: phpoffice/phpspreadsheetFixed in: 3.10.4
composerpatch availablevia ghsa
Product: phpoffice/phpspreadsheetFixed in: 2.4.4
composerpatch availablevia ghsa
Product: phpoffice/phpspreadsheetFixed in: 2.1.15
composerpatch availablevia ghsa
Product: phpoffice/phpspreadsheetFixed in: 1.30.3
github_advisoryworkaround availablevia nvd_reference
View patch

Vendor Advisories (1)

composerGHSA-q4q6-r8wh-5cghcritical

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

Apr 29, 2026

References

github.com / PHPOffice/PhpSpreadsheet/security/advisories/GHSA-q4q6-r8wh-5cgh
ExploitMitigationVendor Advisory