CVE-2026-41675 xmldom: XML node injection through unvalidated processing instruction serialization
Attackers can inject arbitrary XML nodes via unvalidated processing instructions in xmldom, potentially leading to code execution or data exposure.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-41675?
CVE-2026-41675 is a high-severity vulnerability in xmldom, published on 7 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In @xmldom/xmldom prior to versions 0.9.10 and 0.8.13 and xmldom version 0.6.0 and prior, the package allows attacker-controlled processing instruction data to be serialized into XML without validating or neutralizing the PI-closing sequence ?>. As a result, an attacker can terminate the processing instruction early and inject arbitrary XML nodes into the serialized output. This issue has been patched in versions @xmldom/xmldom versions 0.9.10 and 0.8.13.
Weakness: CWE-91
Which versions are affected by CVE-2026-41675?
6 open source packages ship an affected version, including @xmldom/xmldom and xmldom.
| Package | Affected | Fixed in |
|---|---|---|
@xmldom/xmldom npm | All versions | 0.8.13 |
@xmldom/xmldom npm | All versions | 0.8.13 |
@xmldom/xmldom npm | From 0.9.0 | 0.9.10 |
@xmldom/xmldom npm | From 0.9.0 | 0.9.10 |
xmldom npm | All versions to 0.6.0 | None |
xmldom npm | All versions to 0.6.0 | None |
How do I fix CVE-2026-41675?
Upgrade @xmldom/xmldom to a fixed version for your release line: 0.8.13 or 0.9.10.
Is CVE-2026-41675 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-41675 exists.
Sources
Also known as CLEANSTART-2026-HE66205, CLEANSTART-2026-MX84093, CLSA-2026-1778028257, DEBIAN-CVE-2026-41675, ECHO-c9e1-0084-da92, GHSA-x6wf-f3px-wcqx and 6 more.