CVE-2026-83608
xmldom DOCTYPE name injection allows markup injection and possible RCE in affected versions.
Is CVE-2026-83608 being exploited?
Not confirmed. CVE-2026-83608 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-83608?
CVE-2026-83608 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-83608?
Yes. A fix has been recorded for CVE-2026-83608. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-83608 affect?
CVE-2026-83608 affects @xmldom/xmldom < 0.8.15, @xmldom/xmldom < 0.9.12, xmldom <= 0.6.0 (legacy). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-83608?
Upgrade to @xmldom/xmldom 0.8.15 or 0.9.12+; sanitize untrusted XML if unable to upgrade.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Crafted DocumentType.name can terminate <!DOCTYPE> and inject sibling markup, enabling XML/markup injection and potential remote code execution via downstream consumers.
Patch when possible
- affected<= 0.6.0
- affected>= 0.9.0 and < 0.9.12
- affected>= 0.7.0 and < 0.8.15
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.