CVE-2026-78208CWE-73

CVE-2026-78208

High · published August 24, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
42.5
In the wild
Unconfirmed
What it is

exceljs through 4.4.0 contains a path traversal vulnerability in the Workbook.addImage() function that fails to validate file paths. Attackers can supply arbitrary file paths to read any file accessible to the Node.js process and embed it in the generated workbook.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
8.7 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
EPSS
0.00508 · 42.5th percentile
Weakness
CWE-73 · External Control of File Name or Path
Published
2026-08-24T05:16Z
References (5)
https://github.com/exceljs/exceljs · [email protected]https://github.com/exceljs/exceljs/blob/v4.4.0/lib/doc/workbook.js#L142-L147 · [email protected]https://github.com/exceljs/exceljs/blob/v4.4.0/lib/xlsx/xlsx.js#L421-L429 · [email protected]https://github.com/mateocallec/exceljs-hardened/security/advisories/GHSA-m8mg-8574-gm3m · [email protected]https://www.vulncheck.com/advisories/exceljs-through-path-traversal-via-unvalidated-addimage-filename · [email protected]
EPSS history
Timeline
  • 24 AUG 00:30Z
    exceljs through 4.4.0 Path Traversal via Unvalidated addImage filename
    cvelistv5