P4Verified

CVE-2026-78206: exceljs 0 through 4.4.0

CVE-2026-78206. CVSS 3.1 base score 7.5 (HIGH, Vendor/CNA). EPSS 0.0063 (percentile 0.48808), scored 13-Oct-2026.

Affected technology

exceljs · 0 through 4.4.0
exceljs

Description’s affected range: through 4.4.0 decompresses all entries from supplied xlsx archives into memory without limits on entry size

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

Attackers can upload highly compressed workbooks that expand to gigabytes in memory, exhausting available resources and causing denial of service. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 14-Oct-2026 15:58 UTC

CWE: CWE-409
CCR priority: 30.2 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · Vendor/CNA
EPSS: 0.0063 · percentile 0.48808 · 2026-10-13
KEV: no

Provenance

NVD CVE API 2.0 · Source record · observed 2026-10-14 15:56:36.793806+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-78206.html