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TI-2026-54394 Aliases CVE-2026-78208GHSA-vw3h-4fh6-vvqq

exceljs through 4.4.0 Path Traversal via Unvalidated addImage filename

Priority MEDIUM 44CWE-73Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-73 and the CVSS impact.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00508 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
exceljsexceljsup to 4.4.0—No fix listedCNA
  • exceljs Vendorexceljs Affected up to 4.4.0 Fixed in — No fix listed CNA

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-78208
  2. 2026-10-03 Alias added: GHSA-vw3h-4fh6-vvqq

References

Advisory 1

Other 3

  • TI-2026-54393 exceljs through 4.4.0 Prototype Pollution via deepMerge Reached From Note Serialization CVSS 4.0CRITICAL 9.3
  • TI-2026-54392 exceljs through 4.4.0 Uncontrolled Resource Consumption via Unbounded xlsx Decompression CVSS 4.0HIGH 8.7
  • TI-2026-54395 exceljs through 4.4.0 CSV Formula Injection via Unescaped Cell Values CVSS 4.0HIGH 8.4

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences