CVE-2026-73569

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Source
https://cve.org/CVERecord?id=CVE-2026-73569
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73569.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-73569
Aliases
Downstream
Related
Published
2026-08-13T17:45:25.045Z
Modified
2026-08-15T11:47:52.721291265Z
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
fast-xml-parser: Repeated DOCTYPE declarations reset entity expansion limits
Details

fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. From 5.9.3 until 5.10.1, src/xmlparser/OrderedObjParser.js processes multiple DOCTYPE declarations within a single XML document and passes each declaration's entities through addInputEntities(). addInputEntities() resets maxTotalExpansions and maxExpandedLength every time it is called, allowing additional DOCTYPE declarations to repeatedly reset the configured entity-expansion limits during one parse operation. A crafted XML document can then cause excessive CPU use, event-loop blocking, memory exhaustion, and process termination. This issue is fixed in version 5.10.1.

Database specific 
{
    "cwe_ids": [
        "CWE-776"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73569.json",
    "cna_assigner": "GitHub_M"
}
References

Affected packages

Git / github.com/naturalintelligence/fast-xml-parser

Affected ranges

Type
GIT
Repo
https://github.com/naturalintelligence/fast-xml-parser
Events
Introduced
93a09f108d6f457a84e607a6806a7bfd6abc3e55
Fixed
4e546e03987662de5495d050b5fba26bea65383f
Fixed
2ce7191ef0f96473b8c7e0c384fbc4ad34a222de
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "5.9.3"
        },
        {
            "fixed": "5.10.1"
        }
    ]
}

Affected versions

v5.*
v5.10.0
v5.9.3

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-73569.json"