CVE-2026-78206: exceljs through 4.4.0 Uncontrolled Resource Consumption via Unbounded xlsx Decompression
Vendor fix available · Affected: exceljs · Exploitation: unlikely (under 1%)
Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.
Higher than 50% of scored CVEs
DescriptionCVE.org
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.
Affected products1
From the CVE record. A product or version that is not listed is unknown, not unaffected.
- exceljs · exceljsup to and including 4.4.0
On the Atlas
Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.
- Exploitation
- Unlikely (under 1%). EPSS under 1%, or no score yet.
- CISA KEV
- Not listed
- Public check
- No public nuclei template
- Vendor
- exceljs
- Published
- August 2026
CoverageNo articles yet
No CyberSIXT article names CVE-2026-78206 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.