CVE-2026-40296
Essential information
- Published
- 06/05/2026 22:16
- Modified
- 06/05/2026 22:16
- Author
- —
- Creator
- —
- CVSS
- 5.4 MEDIUM (v3.1)
- CISA KEV
- No
- CWE
- —
- CVSS vector
-
—
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N—
CVSS metrics
- Access vector
- —
- Access complexity
- —
- Authentication
- —
- Confidentiality impact
- —
- Integrity impact
- —
- Availability impact
- —
- Exploitability
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- NETWORK
- Attack complexity
- LOW
- Privileges required
- LOW
- User interaction
- REQUIRED
- Scope
- CHANGED
- Confidentiality impact
- LOW
- Integrity impact
- LOW
- Availability impact
- NONE
- Exploit code maturity
- —
- Remediation level
- —
- Report confidence
- —
- Temporal score
- —
- Attack vector
- —
- Attack complexity
- —
- Attack requirements
- —
- Privileges required
- —
- User interaction
- —
- Confidentiality (V)
- —
- Confidentiality (S)
- —
- Integrity (V)
- —
- Integrity (S)
- —
- Availability (V)
- —
- Availability (S)
- —
- Exploit maturity
- —
Description
PhpSpreadsheet is a pure PHP library for reading and writing spreadsheet files. The HTML writer skips htmlspecialchars escaping when a cell's formatted value differs from the original value. When a cell has a custom number format containing the text placeholder @ along with any additional literal characters (for example ". @", "@ ", or "x@"), the formatter replaces @ with the cell value and adds the extra characters, causing the formatted value to differ from the original and bypassing HTML escaping entirely. An attacker who can control the cell value and number format of an uploaded spreadsheet that is later converted to HTML and displayed to other users can achieve stored cross-site scripting. This issue is fixed in versions 5.7.0, 3.10.5, 2.4.5, 2.1.16, and 1.30.4.
NVD status
- Status
- Received — CVE has been recently published to the CVE List and has been received by the NVD.
- Source
- [email protected]
- NVD
- View on NVD
Affected products (CPE)
| Product | CPE |
|---|---|
| phpspreadsheet / phpspreadsheet | cpe:2.3:a:phpspreadsheet:phpspreadsheet:<5.7.0:*:*:*:*:*:*:* |
| phpspreadsheet / phpspreadsheet | cpe:2.3:a:phpspreadsheet:phpspreadsheet:5.7.0:*:*:*:*:*:*:* |
| phpspreadsheet / phpspreadsheet | cpe:2.3:a:phpspreadsheet:phpspreadsheet:3.10.5:*:*:*:*:*:*:* |
| phpspreadsheet / phpspreadsheet | cpe:2.3:a:phpspreadsheet:phpspreadsheet:2.4.5:*:*:*:*:*:*:* |
| phpspreadsheet / phpspreadsheet | cpe:2.3:a:phpspreadsheet:phpspreadsheet:2.1.16:*:*:*:*:*:*:* |
| phpspreadsheet / phpspreadsheet | cpe:2.3:a:phpspreadsheet:phpspreadsheet:1.30.4:*:*:*:*:*:*:* |