xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom versions 0.3.0 through 0.6.0, two independent quadratic paths can cause denial of service. In lib/sax.js, parseElementStartPart repeatedly rescans a malformed tag name to the next > during single-character recovery; in lib/dom.js, normalize() repeatedly removes and appends adjacent text nodes, causing quadratic reindexing and string rebuilding. The first path is reachable through default DOMParser.parseFromString() processing, while the second is also reachable through a direct normalize() call on a programmatically constructed DOM, and endDocument invokes that normalization after parsing. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.
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Affected Vendors & Products
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History
Wed, 02 Sep 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
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| Weaknesses | CWE-1333 | |
| References |
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threat_severity
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cvssV3_1
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Tue, 01 Sep 2026 22:00:00 +0000
| Type | Values Removed | Values Added |
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| First Time appeared |
Xmldom
Xmldom xmldom |
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| Vendors & Products |
Xmldom
Xmldom xmldom |
Tue, 01 Sep 2026 14:45:00 +0000
| Type | Values Removed | Values Added |
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| Description | xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom versions 0.3.0 through 0.6.0, two independent quadratic paths can cause denial of service. In lib/sax.js, parseElementStartPart repeatedly rescans a malformed tag name to the next > during single-character recovery; in lib/dom.js, normalize() repeatedly removes and appends adjacent text nodes, causing quadratic reindexing and string rebuilding. The first path is reachable through default DOMParser.parseFromString() processing, while the second is also reachable through a direct normalize() call on a programmatically constructed DOM, and endDocument invokes that normalization after parsing. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom. | |
| Title | xmldom: Quadratic-time parsing via the malformed-input recovery path — `parseElementStartPart` re-scan and `normalize()` adjacent-text merge | |
| Weaknesses | CWE-400 CWE-407 |
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| References |
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| Metrics |
cvssV4_0
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Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-09-01T14:41:42.582Z
Updated: 2026-09-01T18:05:37.783Z
Reserved: 2026-08-31T20:36:25.744Z
Link: CVE-2026-83614
No data.
Status : Received
Published: 2026-09-01T15:17:39.733
Modified: 2026-09-01T19:17:29.883
Link: CVE-2026-83614