CVE-2026-83613xmldom: Quadratic-time attribute deduplication
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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 version 0.6.0 and earlier, DOMHandler.startElement in lib/dom-parser.js inserts every parsed attribute through setAttributeNode, while NamedNodeMap.setNamedItem in lib/dom.js calls the linear getNamedItem or getNamedItemNS lookup for each insertion. A well-formed element with many distinct attributes therefore requires quadratic comparisons during DOMParser.parseFromString() and can stall a Node.js event loop before application validation. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.
- CVSS
- 8.7 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-407
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Deferred
- Record last updated
- Sep 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
xmldom xmldom xmldom:xmldom (from the name) | through 0.6.0 | CNA record |
References
- https://github.com/xmldom/xmldom/security/advisories/GHSA-8344-3jmq-59r6x-refsource-confirm
- https://github.com/xmldom/xmldom/pull/1071x-refsource-misc
- https://github.com/xmldom/xmldom/pull/1072x-refsource-misc
- https://github.com/xmldom/xmldom/commit/2c548f200cfec991cd5846627ef8f03542309213x-refsource-misc
- https://github.com/xmldom/xmldom/commit/cfb09b5dbeb035fdfedc9f01e2bbaf226bf47cf3x-refsource-misc
- https://github.com/xmldom/xmldom/releases/tag/0.8.15x-refsource-misc
- https://github.com/xmldom/xmldom/releases/tag/0.9.12x-refsource-misc
- https://github.com/xmldom/xmldom/security/advisories/GHSA-27p8-2357-5qqv
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.