Detections
Analytics

SCA: security update for phpoffice/phpspreadsheet (GHSA-84wq-86v6-x5j6)

high Tenable Cloud Security Plugin ID 441003

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. Prior to 1.30.4, 2.1.16,
 2.4.5, 3.10.5, and 5.7.0, the SpreadsheetML XML reader (Reader\Xml) does not validate the ss:Index row
 attribute against the maximum allowed row count (AddressRange::MAX_ROW = 1,048,576). An attacker can craft
 a SpreadsheetML XML file with ss:Index="999999999" on a <Row> element, which inflates the internal
 cachedHighestRow to ~1 billion. Any subsequent call to getRowIterator() without an explicit end row will
 attempt to iterate ~1 billion rows, causing CPU exhaustion and denial of service. This vulnerability is
 fixed in 1.30.4, 2.1.16, 2.4.5, 3.10.5, and 5.7.0. (CVE-2026-40863)

Solution

Update the phpoffice/phpspreadsheet library and its related packages to version 1.30.4 or later.

See Also

https://github.com/advisories/GHSA-84wq-86v6-x5j6

Plugin Details

Severity: High

ID: 441003

Version: Revision 1.7

Type: Local

Family: SCA Checks

Published: 4/30/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.73

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

CVSS Score Source: CVE-2026-40863

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 4/29/2026

Vulnerability Publication Date: 4/29/2026

Reference Information

CVE: CVE-2026-40863

cwe: CWE-400