Red Hat Security Advisory: nginx security update
nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Security Fix(es): * nginx: NGINX: Denial of Service or Code Execution via specially crafted MP4 files (CVE-2026-32647) * NGINX: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module (CVE-2026-27654) * NGINX: NGINX: Denial of Service due to memory corruption via crafted MP4 file (CVE-2026-27784) * NGINX: NGINX: Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled (CVE-2026-27651) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
AI Analysis
Technical Summary
Red Hat Product Security released an advisory (RHSA-2026:13634) addressing four vulnerabilities in nginx affecting Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder products. The vulnerabilities include denial of service and potential code execution via specially crafted MP4 files (CVE-2026-32647), denial of service or file modification via buffer overflow in the ngx_http_dav_module (CVE-2026-27654), denial of service due to memory corruption via crafted MP4 files (CVE-2026-27784), and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled (CVE-2026-27651). The advisory provides updated nginx packages (version 1.26.3-1.el10_0.8) that fix these issues. The vulnerabilities are rated as important by Red Hat, with a high severity level indicated in the input data. No known exploits in the wild have been reported at the time of the advisory.
Potential Impact
The vulnerabilities can lead to denial of service conditions, potentially disrupting nginx server availability. One vulnerability (CVE-2026-32647) may allow code execution via specially crafted MP4 files, increasing the risk severity. Another vulnerability (CVE-2026-27654) could allow file modification through a buffer overflow in the ngx_http_dav_module. The denial of service via memory corruption (CVE-2026-27784) and denial of service via undisclosed requests when ngx_mail_auth_http_module is enabled (CVE-2026-27651) further impact service reliability. These issues affect nginx installations on Red Hat Enterprise Linux 10.0 Extended Update Support and related products. No confirmed exploitation in the wild has been reported.
Mitigation Recommendations
Red Hat has released updated nginx packages (version 1.26.3-1.el10_0.8) that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 10.0 Extended Update Support and related products should apply these updates promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. The advisory indicates an official fix is available. No additional mitigation steps are specified beyond applying the vendor-provided updates.
Red Hat Security Advisory: nginx security update
Description
nginx is a web and proxy server supporting HTTP and other protocols, with a focus on high concurrency, performance, and low memory usage. Security Fix(es): * nginx: NGINX: Denial of Service or Code Execution via specially crafted MP4 files (CVE-2026-32647) * NGINX: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module (CVE-2026-27654) * NGINX: NGINX: Denial of Service due to memory corruption via crafted MP4 file (CVE-2026-27784) * NGINX: NGINX: Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled (CVE-2026-27651) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
Affected software
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Product Security released an advisory (RHSA-2026:13634) addressing four vulnerabilities in nginx affecting Red Hat Enterprise Linux 10.0 Extended Update Support and related CodeReady Linux Builder products. The vulnerabilities include denial of service and potential code execution via specially crafted MP4 files (CVE-2026-32647), denial of service or file modification via buffer overflow in the ngx_http_dav_module (CVE-2026-27654), denial of service due to memory corruption via crafted MP4 files (CVE-2026-27784), and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled (CVE-2026-27651). The advisory provides updated nginx packages (version 1.26.3-1.el10_0.8) that fix these issues. The vulnerabilities are rated as important by Red Hat, with a high severity level indicated in the input data. No known exploits in the wild have been reported at the time of the advisory.
Potential Impact
The vulnerabilities can lead to denial of service conditions, potentially disrupting nginx server availability. One vulnerability (CVE-2026-32647) may allow code execution via specially crafted MP4 files, increasing the risk severity. Another vulnerability (CVE-2026-27654) could allow file modification through a buffer overflow in the ngx_http_dav_module. The denial of service via memory corruption (CVE-2026-27784) and denial of service via undisclosed requests when ngx_mail_auth_http_module is enabled (CVE-2026-27651) further impact service reliability. These issues affect nginx installations on Red Hat Enterprise Linux 10.0 Extended Update Support and related products. No confirmed exploitation in the wild has been reported.
Mitigation Recommendations
Red Hat has released updated nginx packages (version 1.26.3-1.el10_0.8) that address these vulnerabilities. Users of affected Red Hat Enterprise Linux 10.0 Extended Update Support and related products should apply these updates promptly following Red Hat's guidance at https://access.redhat.com/articles/11258. The advisory indicates an official fix is available. No additional mitigation steps are specified beyond applying the vendor-provided updates.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:13634
- Cve Count
- 4
- Additional Cves
- ["CVE-2026-27654","CVE-2026-27784","CVE-2026-32647"]
- Cvss Version
- null
Threat ID: 6a3da1c74853345fc1820f1b
Added to database: 06/25/2026, 21:46:47 UTC
Last enriched: 06/25/2026, 22:00:01 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 32
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