CVE catalog
CVE-2026-40296
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 ce
- Severity
- Medium · CVSS 5.4
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.22% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | phpspreadsheet | Not reported | 1.30.4 | fixed |
| Cpe | phpspreadsheet | Not reported | 2.1.16 | fixed |
| Cpe | phpspreadsheet | Not reported | 2.4.5 | fixed |
| Cpe | phpspreadsheet | Not reported | 3.10.5 | fixed |
| Cpe | phpspreadsheet | Not reported | 5.7.0 | fixed |
| Cpe | phpspreadsheet | Not reported | 5.7.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | phpspreadsheet | cpe | Not reported | 1.30.4 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 2.1.16 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 2.4.5 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 3.10.5 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 5.7.0 | Not reported | Not reported | Not reported |
| Cpe | phpspreadsheet | cpe | Not reported | 5.7.0 | Not reported | NVD-CVE-2026-40296 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed: