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CVE-2026-30121
critical
CVSS 9.1
Remotion: arbitrary file write vulnerability
Summary
Remotion: arbitrary file write vulnerability
AI summary snake-internal / snake-template-v1
A weakness called CVE-2026-30121 was discovered in the affected product.
Severity is Critical (CVSS 9.1/10). If exploited, attackers can fully take over the affected system.
What you should do: update the affected software to the latest version. If unsure, ask your IT team or search the vendor's site for "the product CVE-2026-30121".
CVE-2026-30121 (the affected product). Severity: Critical / CVSSv3 9.1. Category: CWE-123.
Response plan:
1. Check the vendor advisory for affected versions and the patched release.
2. If a vulnerable version is running in production, schedule maintenance (urgency from KEV/CVSS).
3. If no patch yet, mitigate via WAF rule, disabling the affected feature, etc.
4. Monitor logs / SIEM for known IOC and PoC signatures of this CVE.
PoCs and fix commits: see the 'References' section, MITRE, and NVD.
❓ What is the problem
A weakness (CVE-2026-30121) in the affected product. A serious software flaw has been identified.
📍 Affected scope
Target versions of the affected product (see vendor advisory). If running in production, identify exposure immediately.
🔥 Severity
Severity: Critical (CVSS 9.1/10). If exploited, attackers can fully take over the affected system.
🔧 How to fix
Update to the patched release as listed in the vendor advisory. (Typical mitigation pattern for CWE-123)
🛡️ Workaround
If a patch is not yet available, consider disabling the affected feature, applying WAF rules, blocking via network ACLs, or isolating the vulnerable version.
🔍 Detection
Check version information, scan dependencies via SBOM, and monitor SIEM for IOC and PoC signatures related to this CVE.
Affected packages
npm
remotion
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.410"}]}]
References
- web https://github.com/EaEa0001/security-advisories/blob/main/CVE-2026-30121.md
- web https://nvd.nist.gov/vuln/detail/CVE-2026-30121
- web https://github.com/advisories/GHSA-g6pc-6676-c23j
- web https://github.com/remotion-dev/remotion/pull/6378
- web https://github.com/remotion-dev/remotion/releases/tag/v4.0.410