CVE-2026-32647: NGINX ngx_http_mp4_module vulnerability
- Is it exploited?
Not on CISA's list. CISA has not added it to the Known Exploited Vulnerabilities catalog as of . If CISA adds it, this page shows it as known exploited.
- How likely is exploitation in the next 30 days?
- 0.9%
Up from 0.4% on .
EPSS score, percentile 60.7 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 8.5 High
CVSS v4.0 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
- Which versions are affected?
Affected
- from 1.29.0 to before 1.29.7
- from 1.1.19 to before 1.28.3
- from R36 to before R36 P3
- from R35 to before R35 P2
- R34
- R33
and 1 more in the table below
Source: CISA KEV 2026.10.29, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
What to do
Advisories and patches
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
As listed in the CVE record.
| Status | Versions |
|---|---|
| Affected | from 1.29.0 to before 1.29.7 |
| Affected | from 1.1.19 to before 1.28.3 |
Versions not listed are: unknown.
| Status | Versions |
|---|---|
| Affected | from R36 to before R36 P3 |
| Affected | from R35 to before R35 P2 |
| Affected | R34 |
| Affected | R33 |
| Affected | from R32 to before R32 P5 |
Versions not listed are: unaffected.
Source: CVE List, as of . About the data.
About this vulnerability
NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to trigger a buffer over-read or over-write to the NGINX worker memory resulting in its termination or possibly code execution, using a specially crafted MP4 file. This issue affects NGINX Open Source and NGINX Plus if it is built with the ngx_http_mp4_module module and the mp4 d…
Summary: CVE record, as of .
- CISA has not added CVE-2026-32647 to its Known Exploited Vulnerabilities (KEV) catalog, as of 29 Oct 2026.
- The CVE record was published on 24 Mar 2026.
- The CVE record carries a CVSS v4.0 base score of 8.5 (High), given by its CNA.
- FIRST's EPSS model puts the probability of exploitation in the next 30 days at 0.9% (percentile 60.7), as of 29 Oct 2026. EPSS is a statistical estimate, not a report of exploitation.
- CISA's SSVC assessment in the CVE record: exploitation none, automatable no, technical impact total.
- The credits in the CVE record name AISLE as finder.
Source: CISA KEV 2026.10.29, as of ; CVE List, as of ; FIRST EPSS, as of . About the data.
Description
NGINX ngx_http_mp4_module vulnerability
NGINX Open Source and NGINX Plus have a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to trigger a buffer over-read or over-write to the NGINX worker memory resulting in its termination or possibly code execution, using a specially crafted MP4 file. This issue affects NGINX Open Source and NGINX Plus if it is built with the ngx_http_mp4_module module and the mp4 directive is used in the configuration file. Additionally, the attack is possible only if an attacker can trigger the processing of a specially crafted MP4 file with the ngx_http_mp4_module module. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
Source: CVE List, as of . About the data.
Weakness
CWE-125
- CWE-125: Out-of-bounds Read
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published | |
| CVE record last updated |
Known exploited F5 vulnerabilities
- CVE-2026-94127: F5 BIG-IP APM Heap-based Buffer Overflow Vulnerability
- CVE-2025-53521: F5 BIG-IP Stack-Based Buffer Overflow Vulnerability
- CVE-2023-46747: F5 BIG-IP Configuration Utility Authentication Bypass Vulnerability
- CVE-2023-46748: F5 BIG-IP Configuration Utility SQL Injection Vulnerability
- CVE-2022-1388: F5 BIG-IP Missing Authentication Vulnerability