CVE-2026-83619
CVE-2026-83619 · xmldom: End-tag Whitespace-Trim Regex ReDoS — quadratic backtracking in the 0.8.x end-tag parser
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 8.7 · High · EPSS 0.5% · Fix available
- Published
- Updated
Affected products and versions
xmldom
- Versions
- >= 0.7.0, < 0.8.15: Affected
No fix published
node-xmldom Debian:12
- Versions
- 0.8.6-1
- 0.9.10-1
- 0.9.10-2
- 0.9.11-1
- 0.9.12-1
- 0.9.5-1
- 0.9.6-1
- 0.9.8-1
- 0.9.8-2
- 0.9.9-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-xmldom Debian:13
- Affected ranges
- ECOSYSTEM: < 0.9.5-1
Update to 0.9.5-1
node-xmldom Debian:14
- Affected ranges
- ECOSYSTEM: < 0.9.5-1
Update to 0.9.5-1
@xmldom/xmldom npm
- Affected ranges
- SEMVER: ≥ 0.7.0, < 0.8.15
Update to 0.8.15
node-xmldom Ubuntu:20.04:LTS
- Versions
- 0.1.27+ds-1
- 0.1.27+ds-1+deb10u2build0.20.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-xmldom Ubuntu:22.04:LTS
- Versions
- 0.5.0-1
- 0.7.3-1
- 0.7.5-1
- 0.7.5-1ubuntu0.22.04.1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published
node-xmldom Ubuntu:24.04:LTS
- Versions
- 0.8.6-1
- Affected ranges
- ECOSYSTEM: (−∞, +∞)
No fix published