CVE-2026-83606

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Source
https://cve.org/CVERecord?id=CVE-2026-83606
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83606.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-83606
Aliases
  • GHSA-g53g-w8rj-fmg7
Downstream
Published
2026-09-01T14:21:27.215Z
Modified
2026-09-03T03:48:17.126365711Z
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
xmldom PI grammar regex ReDoS: quadratic backtracking on unterminated processing instructions
Details

xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0-beta.9 until 0.9.11, the processing-instruction production in lib/grammar.js lets the greedy S+ separator and lazy Char*? data group repeatedly repartition a long whitespace tail when the required closing ?> is absent. Both parsePI and parseProcessingInstruction apply the expression to the entire remaining source, causing quadratic backtracking during DOMParser.parseFromString() under default options and allowing a small unauthenticated XML input to stall the Node.js event loop. This issue is fixed in @xmldom/xmldom version 0.9.11.

Database specific 
{
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/83xxx/CVE-2026-83606.json",
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
        "CWE-1333",
        "CWE-400"
    ]
}
References

Affected packages

Git / github.com/xmldom/xmldom

Affected ranges

Type
GIT
Repo
https://github.com/xmldom/xmldom
Events
Introduced
48953f6e6d1d49093c8014c4585b31833de78812
Fixed
73df6b8bdbd86f904b9e8c3ab9c49aa54ef2802e
Fixed
1f0610959ab7b82cc7ad702d1be0243efc5791c0
Database specific
Show details 
{
    "source": [
        "AFFECTED_FIELD",
        "REFERENCES"
    ],
    "extracted_events": [
        {
            "introduced": "0.9.0-beta.9"
        },
        {
            "fixed": "0.9.11"
        }
    ]
}

Affected versions

0.*
0.9.0
0.9.0-beta.10
0.9.0-beta.11
0.9.0-beta.9
0.9.1
0.9.10
0.9.2
0.9.3
0.9.4
0.9.5
0.9.6
0.9.7
0.9.8
0.9.9

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-83606.json"