THREAT OPS › Threat News › [NVD] CVE-2026-78206 (HIGH 7.5) — 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 d
[NVD] CVE-2026-78206 (HIGH 7.5) — 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 d
CVE-2026-78206 CVSS: 7.5 HIGH Published: 2026-08-24T01:16:57.973
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.
MITRE ATT&CK techniques
- CompressionT1027.015
Indicators of compromise
- CVE-2026-78206cve
Original source: https://nvd.nist.gov/vuln/detail/CVE-2026-78206