Inefficient Algorithmic Complexity in xmldom - CVE-2026-83613
Published: August 25, 2026 / Updated: September 2, 2026
Vulnerability identifier: #VU145134
CSH Severity: Medium
CVSS v4: 8.7 [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]
CVE-ID: CVE-2026-83613
CWE-ID: CWE-407
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to inefficient algorithmic complexity in attribute deduplication in NamedNodeMap during XML parsing when processing a well-formed XML document containing a single element with many distinct attributes. A remote attacker can submit a specially crafted XML document to cause a denial of service.
The issue is triggered by valid input and does not require malformed markup, error recovery, namespace declarations, nesting, or non-default parser options.
Affected software
xmldom
IBM DataPower Gateway
IBM DataPower Gateway
How to mitigate CVE-2026-83613
Install security update from vendor's website.
xmldom - addressed in versions 0.8.15, 0.9.12
IBM DataPower Gateway - addressed in versions 10.5.0.23, 10.6.0.11, 11.0.0.3
IBM DataPower Gateway - addressed in versions 10.5.0.23, 10.6.0.11, 11.0.0.3