What is CVE-2026-30121?

CVE-2026-30121 is a critical-severity vulnerability in Remotion, classified under Write-what-where Condition. CVSS score: 9.1/10. Published 2026-06-15.

How severe is CVE-2026-30121?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Remotion

CVE-2026-30121

remotion-dev remotion v4.0.409 was discovered to contain an arbitrary file write vulnerability.

Published 2026-06-15 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (39.0th percentile), scored 2026-10-03.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 39th percentile — 39.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Remotion — versions 4.0.409

Weakness classification (CWE)

CWE-123 — Write-what-where Condition

References

github.com/EaEa0001/security-advisories/blob/main/CVE-2026-30121.md (Third Party Advisory)

Frequently asked questions

What is CVE-2026-30121?: CVE-2026-30121 is a critical-severity vulnerability in Remotion, classified under Write-what-where Condition. CVSS score: 9.1/10. Published 2026-06-15.
How severe is CVE-2026-30121?: Critical severity. CVSS v3 base score is 9.1 out of 10.