Dashboard / CVE-2026-78206

CVE-2026-78206

HIGH
MEDIUM Priority: 0.05 BB Relevance: 78/100
Published: 2026-08-24 Modified: 2026-11-08 First seen: 2026-11-08 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network
AC: Low
PR: None
UI: None
AT: None
VC: None
VI: None
VA: High

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 (1)

Affected Software (1)

VendorProductVersion
exceljs exceljs 0

References & Advisories (4)

Bug Bounty Relevance

78 / 100
✓ Network accessible
✓ No authentication
✓ Low complexity
✓ No user interaction

CVSS Score

8.7 / 10.0 v4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

EPSS — Exploitation Probability

0.63%
Raw Score 0.006300
Percentile 50.7%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00630
2026-11-12
0.00630
2026-11-10
0.00630
2026-11-09
0.00630
2026-11-08
0.00630

Intelligence Sources

mitre ref →

External Links