CVE-2026-83614Public exploitNetwork attack vectorHinoki check available

Service stall via quadratic malformed-XML recovery

Published Sep 1, 2026 · Updated Sep 1, 2026

Quadratic-time processing in affected xmldom releases allows remote attackers to stall Node.js services via crafted XML. parseElementStartPart repeatedly rescans malformed tag names during single-character recovery, while normalize() repeatedly reindexes and rebuilds adjacent text nodes. Exploitation requires untrusted XML to reach default parsing, or attacker-influenced adjacent text nodes to reach normalize(), and interrupts the event loop without reported data exposure or modification.

CVSS severity8.7
High
EPSS probability0.35%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Quadratic-time processing in affected xmldom releases allows remote attackers to stall Node.js services via crafted XML. parseElementStartPart repeatedly rescans malformed tag names during single-character recovery, while normalize() repeatedly reindexes and rebuilds adjacent text nodes. Exploitation requires untrusted XML to reach default parsing, or attacker-influenced adjacent text nodes to reach normalize(), and interrupts the event loop without reported data exposure or modification.

The record

CVE
CVE-2026-83614
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
xmldom
Product
xmldom
Classifications
CWE-407, CWE-400, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 0.3.0, <= 0.6.0
  2. Affected versionversion=>= 0.7.0, < 0.8.15
  3. Affected versionversion=>= 0.9.0, < 0.9.12

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

xmldom · xmldomversion=>= 0.3.0, <= 0.6.0; version=>= 0.7.0, < 0.8.15; version=>= 0.9.0, < 0.9.12

Published CVSS scores

8.7GitHub CNACVSS: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 describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-407Inefficient Algorithmic Complexity
CWE-400Uncontrolled Resource Consumption
T1499Endpoint Denial of Service

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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