NGINX is widely deployed; RCE/crash risk in configured environments with mp4 module.
CVE-2026-32647
Remote code execution via crafted MP4 in NGINX mp4 module.
Is CVE-2026-32647 being exploited?
Not confirmed. CVE-2026-32647 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 0.92% probability of exploitation in the next 30 days.
How severe is CVE-2026-32647?
CVE-2026-32647 is rated High with a CVSS score of 8.5. 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-2026-32647?
Yes. A fix has been recorded for CVE-2026-32647. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-32647 affect?
CVE-2026-32647 affects NGINX Open Source (ngx_http_mp4_module with mp4 directive), NGINX Plus (ngx_http_mp4_module with mp4 directive). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-32647?
Disable mp4 module if unused; monitor for fixes and apply patch when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
RCE or worker crash when processing a crafted MP4 with mp4 module enabled.
Patch when possible
- affected>= 1.29.0 and < 1.29.7
- affected>= 1.1.19 and < 1.28.3
- affected>= R36 and < R36 P3
- affected>= R35 and < R35 P2
- affected>= R34 and < *
- affected>= R33 and < *
- affected>= R32 and < R32 P5
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.