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@xmldom/xmldom EUVDEUVD-2026-69216

| CVE-2026-83606 HIGH
Uncontrolled Resource Consumption (CWE-400)
2026-09-01 GitHub_M GHSA-g53g-w8rj-fmg7
Denial Of Service Node.js Xmldom
8.7
CVSS 4.0 · Vendor: GitHub_M
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Severity by source

Vendor (GitHub_M) PRIMARY
8.7 HIGH
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
vuln.today AI
7.5 HIGH

Network-reachable with no privileges or interaction required; impact is pure availability (event-loop stall); scope is unchanged as only the parsing process is affected.

3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
SUSE
7.5 HIGH
AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Red Hat
7.5 HIGH
qualitative

Primary rating from Vendor (GitHub_M).

CVSS VectorVendor: GitHub_M

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
X

Lifecycle Timeline

5
POC Analysis Generated
Sep 11, 2026 - 11:29 vuln.today
Patch available
Sep 01, 2026 - 16:02 EUVD
Source Code Evidence Fetched
Sep 01, 2026 - 15:14 vuln.today
Analysis Generated
Sep 01, 2026 - 15:14 vuln.today
CVE Published
Sep 01, 2026 - 14:21 cve.org
HIGH 8.7

DescriptionCVE.org

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.

Articles & Coverage 2

News 4 New Node.js Vulnerabilities - 4 High Severity Sep 02, 2026 News 4 New Node.js Vulnerabilities - 4 High Severity Sep 01, 2026

AnalysisAI

Quadratic regex backtracking in @xmldom/xmldom versions 0.9.0-beta.9 through 0.9.10 allows unauthenticated remote attackers to stall the Node.js event loop by supplying a small malformed XML document containing an unterminated processing instruction with a long whitespace tail. The flaw resides in the processing-instruction production regex in lib/grammar.js, where the greedy S+ separator and lazy Char*? …

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Hypothetical attack flow derived from CVE metadata

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Vulnerability AssessmentAI

Exploitation Exploitation requires that the target application uses @xmldom/xmldom in the version range 0.9.0-beta.9 through 0.9.10 and passes attacker-controlled data to DOMParser.parseFromString() under the library's default options - no non-default xmldom configuration is required. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 4.0 score of 8.7 (AV:N/AC:L/AT:N/PR:N/UI:N/VA:H) accurately characterizes a network-reachable exploit requiring no authentication, no special attack requirements, and no user interaction, with high availability impact on the vulnerable system. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario Full exploit scenario with step-by-step reproduction available after sign-in.
Remediation Upgrade to @xmldom/xmldom version 0.9.11 or later via npm (npm install @xmldom/xmldom@0.9.11), confirmed by the official GitHub release at https://github.com/xmldom/xmldom/releases/tag/0.9.11 and the merged fix in PR #1039. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, identify all applications and services using @xmldom/xmldom versions 0.9.0-beta.9 through 0.9.10 and risk-prioritize based on internet exposure and XML processing requirements. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
SUSE Linux Enterprise Desktop 15 SP7 Not-Affected
SUSE Linux Enterprise Module for Python 3 15 SP7 Not-Affected
SUSE Linux Enterprise Server 15 SP7 Not-Affected
SUSE Linux Enterprise Server for SAP Applications 15 SP7 Not-Affected
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Affected

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EUVD-2026-69216 vulnerability details – vuln.today
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