CVE-2026-30121
Arbitrary file write in remotion-dev Remotion v4.0.409
Is CVE-2026-30121 being exploited?
Not confirmed. CVE-2026-30121 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 0.32% probability of exploitation in the next 30 days.
How severe is CVE-2026-30121?
CVE-2026-30121 is rated Critical with a CVSS score of 9.1. 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-2026-30121?
Not known from our data. No patch reference has been recorded for CVE-2026-30121, 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-2026-30121 affect?
CVE-2026-30121 affects remotion-dev Remotion v4.0.409. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-30121?
Upgrade to fixed version when released; limit file write access
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Arbitrary file write on host via vulnerable API; could cause data loss, config tampering, or potential remote code execution in exposed apps.
Patch when possible