P4Verified

CVE-2026-78209: exceljs 0 through 4.4.0

CVE-2026-78209. CVSS 3.1 base score 8.2 (HIGH, Vendor/CNA). EPSS 0.0041 (percentile 0.33403), scored 13-Oct-2026.

Affected technology

exceljs · 0 through 4.4.0
exceljs

Description’s affected range: through 4.4.0 fails to neutralize leading equals

Component: Not specified by the source

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

What an attacker can do

Vendor/CNA’s CVSS 4.0 assessment (base score 8.4/10) rates confidentiality impact as high; integrity impact as low; availability impact as none. The description does not specify what an attacker can achieve beyond these rated impacts.

Published 14-Oct-2026 15:58 UTC

CWE: CWE-1236
CCR priority: 32.9 /100 (P4)
CVSS 3.1: 8.2 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N · Vendor/CNA
EPSS: 0.0041 · percentile 0.33403 · 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-2026-78209.html