CVE-2026-11422
Code injection in WaveDrom rendering for Markdown Preview Enhanced.
Is CVE-2026-11422 being exploited?
Not confirmed. CVE-2026-11422 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 0.16% probability of exploitation in the next 30 days.
How severe is CVE-2026-11422?
CVE-2026-11422 is rated High with a CVSS score of 8.4. 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-2026-11422?
Not known from our data. No patch reference has been recorded for CVE-2026-11422, which is not the same as no patch existing — a fix may have shipped without a tagged reference, or after this record was written. The vendor advisory is the only authority on whether a fix exists, and mitigations may be available regardless.
What does CVE-2026-11422 affect?
CVE-2026-11422 affects Markdown Preview Enhanced 0.8.x, Crossnote Engine 0.9.28, VS Code Webview/Extension. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-11422?
Update when fixed; otherwise disable the extension.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
JS execution in VS Code webview from a crafted wavedrom block; can write arbitrary local files.
Patch when possible
- affected< 0.9.28
- affected< 0.8.27
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.