Resource Exhaustion Affecting node-xmldom package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.52% (42nd percentile)

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  • Snyk IDSNYK-ECHOLATEST-NODEXMLDOM-19498280
  • published2 Sept 2026
  • disclosed1 Sept 2026

Introduced: 1 Sep 2026

CVE-2026-83606  (opens in a new tab)
CWE-400  (opens in a new tab)
CWE-1333  (opens in a new tab)

How to fix?

There is no fixed version for Echo:latest node-xmldom.

NVD Description

Note: Versions mentioned in the description apply only to the upstream node-xmldom package and not the node-xmldom package as distributed by Echo. See How to fix? for Echo:latest relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1