VULNERABILITY INTELLIGENCE
CVE-2026-78206
CVSS score7.5 HIGH
EPSS probability0.63%
CISA KEVNot currently listed
Published2026-08-24
Last modified2026-10-14
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Description
exceljs through 4.4.0 decompresses all entries from supplied xlsx archives into memory without limits on entry size, total size, or compression ratio. Attackers can upload highly compressed workbooks that expand to gigabytes in memory, exhausting available resources and causing denial of service.
Weakness classification
- disclosure@vulncheck.com: CWE-409