Vulnerability Details CVE-2026-27784
The 32-bit implementation of NGINX Open Source has a vulnerability in the ngx_http_mp4_module module, which might allow an attacker to over-read or over-write NGINX worker memory resulting in its termination, using a specially crafted MP4 file. The issue only affects 32-bit NGINX Open Source 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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 1.8%
CVSS Severity
CVSS v3 Score 7.8
Products affected by CVE-2026-27784
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cpe:2.3:a:f5:nginx_open_source:1.25.0
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cpe:2.3:a:f5:nginx_open_source:1.25.1
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cpe:2.3:a:f5:nginx_open_source:1.25.2
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cpe:2.3:a:f5:nginx_open_source:1.25.3
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cpe:2.3:a:f5:nginx_open_source:1.25.4
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cpe:2.3:a:f5:nginx_open_source:1.26.1
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cpe:2.3:a:f5:nginx_open_source:1.26.2
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cpe:2.3:a:f5:nginx_open_source:1.27.0
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cpe:2.3:a:f5:nginx_open_source:1.28.2
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cpe:2.3:a:f5:nginx_open_source:1.29.0
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cpe:2.3:a:f5:nginx_open_source:1.29.5
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cpe:2.3:a:f5:nginx_open_source:1.3.0
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cpe:2.3:a:f5:nginx_open_source:1.5.13