PT-2026-79799 · Npm · Exceljs-Hardened
CVE-2026-78206
·
Published
2026-08-24
·
Updated
2026-08-29
CVSS v4.0
8.7
High
| Vector | AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N |
Name of the Vulnerable Software and Affected Versions
exceljs-hardened versions prior to 5.0.0
Description
The software decompresses all entries from supplied xlsx archives into memory without limits on entry size, total size, or compression ratio. This allows attackers to upload highly compressed workbooks that expand to gigabytes in memory, exhausting available resources and causing a denial of service (DoS), which is a condition where a system becomes unavailable to its intended users.
Recommendations
Update to version 5.0.0 or later.
Exploit
Fix
DoS
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Weakness Enumeration
Related Identifiers
Affected Products
Exceljs-Hardened