High [CVE-2026-83619] @xmldom/xmldom: xmldom: Denial of Service via crafted XML input
This high-severity Red Hat Linux advisory covers CVE-2026-83619 affecting Red Hat Build of Podman Desktop, Red Hat Developer Hub, Red Hat Enterprise Linux 10.
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Summary
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.7.0 until 0.8.15, the release-0.8.x parser in lib/sax.js trims captured end-tag names with the unanchored global expression /[ \t\n\r]+$/g.
For an end tag containing a long whitespace run followed by a non-whitespace character, the expression retries from each possible starting position and backtracks quadratically before failing its end anchor.
DOMParser.parseFromString() reaches the path under default options, allowing a small unauthenticated XML input to stall the Node.js event loop; the 0.9.x and unscoped npm lines do not contain this expression. This issue is fixed in @xmldom/xmldom version 0.8.15.
A flaw was found in xmldom, a JavaScript module used for processing XML documents. A remote attacker could exploit a vulnerability in the XML parser by submitting a specially crafted XML input.
This could lead to a Denial of Service (DoS), causing the affected system to become unresponsive by stalling the Node.js event loop. The vulnerability stems from a regular expression that processes end-tags inefficiently, consuming excessive resources.
Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H). Weakness: CWE-1333.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 0.8.15. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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