CVE-2026-78206

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Source
https://cve.org/CVERecord?id=CVE-2026-78206
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78206.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-78206
Aliases
  • GHSA-7cvf-3r55-r39q
Published
2026-08-24T00:30:46.462Z
Modified
2026-08-25T04:02:57.594640090Z
Severity
  • 8.7 (High) CVSS_V4 - 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 CVSS Calculator
Summary
exceljs through 4.4.0 Uncontrolled Resource Consumption via Unbounded xlsx Decompression
Details

exceljs-hardened before 5.0.0 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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-409"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78206.json"
}
References

Affected packages

Git / github.com/exceljs/exceljs

Affected ranges

Type
GIT
Repo
https://github.com/exceljs/exceljs
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Last affected
ac96f9a61e9799c7776bd940f05c4a51d7200209
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "4.4.0"
        }
    ],
    "source": "AFFECTED_FIELD"
}
Type
GIT
Repo
https://github.com/mateocallec/exceljs-hardened
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
37149551343c6305aa8aca4f43567c1091102287
Database specific
Show details 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "fixed": "5.0.0"
        }
    ],
    "source": "DESCRIPTION"
}

Affected versions

0.*
0.0.1
0.0.2
0.0.3
0.0.4
0.0.5
0.0.6
0.0.7
0.0.8
0.0.9
0.1.0
0.1.1
0.1.10
0.1.11
0.1.2
0.1.3
0.1.4
0.1.5
0.1.6
0.1.7
0.1.8
0.1.9
0.2.0
0.2.1
0.2.10
0.2.11
0.2.12
0.2.15
0.2.16
0.2.17
0.2.18
0.2.19
0.2.2
0.2.20
0.2.21
0.2.22
0.2.23
0.2.24
0.2.26
0.2.27
0.2.28
0.2.29
0.2.3
0.2.30
0.2.31
0.2.33
0.2.34
0.2.35
0.2.36
0.2.8
v0.*
v0.0.1
v0.0.2
v0.0.3
v0.0.4
v0.0.5
v0.0.6
v0.0.7
v0.0.8
v0.0.9
v0.1.0
v0.1.1
v0.1.10
v0.1.11
v0.1.2
v0.1.3
v0.1.4
v0.1.5
v0.1.6
v0.1.7
v0.1.8
v0.1.9
v0.2.0
v0.2.1
v0.2.10
v0.2.11
v0.2.12
v0.2.15
v0.2.16
v0.2.17
v0.2.18
v0.2.19
v0.2.2
v0.2.20
v0.2.21
v0.2.22
v0.2.23
v0.2.24
v0.2.26
v0.2.27
v0.2.28
v0.2.29
v0.2.3
v0.2.30
v0.2.31
v0.2.33
v0.2.34
v0.2.35
v0.2.36
v0.2.8
v0.4.10
v0.4.11
v0.4.12
v0.4.13
v0.4.14
v0.4.9
v0.5.0
v0.5.1
v0.6.0
v0.6.2
v0.7.0
v0.7.1
v0.8.0
v0.8.1
v0.8.2
v0.8.3
v0.8.4
v0.8.5
v0.9.0
v0.9.1
v1.*
v1.0.0
v1.0.1
v1.0.2
v1.1.0
v1.1.1
v1.1.2
v1.1.3
v1.10.0
v1.11.0
v1.12.0
v1.12.1
v1.12.2
v1.13.0
v1.14.0
v1.15.0
v1.2.0
v1.2.1
v1.3.0
v1.4.0
v1.4.1
v1.4.10
v1.4.11
v1.4.12
v1.4.13
v1.4.2
v1.4.3
v1.4.4
v1.4.5
v1.4.6
v1.4.7
v1.4.8
v1.4.9
v1.5.0
v1.5.1
v1.6.0
v1.6.1
v1.6.2
v1.6.3
v1.7.0
v1.8.0
v1.9.0
v1.9.1
v2.*
v2.0.0
v2.0.1
v3.*
v3.0.0
v3.1.0
v3.10.0
v3.2.0
v3.3.0
v3.3.1
v3.4.0
v3.5.0
v3.7.0
v3.8.0
v3.8.1
v3.8.2
v3.9.0
v4.*
v4.0.0
v4.0.1
v4.1.0
v4.1.1
v4.2.0
v4.2.1
v4.3.0
v4.4.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-78206.json"