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-2026:13839) addressing four nginx vulnerabilities: CVE-2026-32647 allows denial of service or code execution via crafted MP4 files; CVE-2026-27654 involves a buffer overflow in ngx_http_dav_module causing denial of service or file modification; CVE-2026-27784 causes denial of service due to memory corruption via crafted MP4 files; and CVE-2026-27651 leads to denial of service via undisclosed requests when ngx_mail_auth_http_module is enabled. These vulnerabilities affect nginx as distributed in Red Hat Enterprise Linux 9.4 and related packages. The advisory provides updated packages to remediate these issues.
Potential Impact
The vulnerabilities can cause denial of service conditions and, in one case, potential code execution or file modification. This impacts the availability and integrity of systems running vulnerable nginx versions. Exploitation requires specially crafted MP4 files or specific requests targeting vulnerable modules. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated nginx packages for Red Hat Enterprise Linux 9.4 that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:13839 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
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
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Red Hat Product Security released an advisory (RHSA-2026:13839) addressing four nginx vulnerabilities: CVE-2026-32647 allows denial of service or code execution via crafted MP4 files; CVE-2026-27654 involves a buffer overflow in ngx_http_dav_module causing denial of service or file modification; CVE-2026-27784 causes denial of service due to memory corruption via crafted MP4 files; and CVE-2026-27651 leads to denial of service via undisclosed requests when ngx_mail_auth_http_module is enabled. These vulnerabilities affect nginx as distributed in Red Hat Enterprise Linux 9.4 and related packages. The advisory provides updated packages to remediate these issues.
Potential Impact
The vulnerabilities can cause denial of service conditions and, in one case, potential code execution or file modification. This impacts the availability and integrity of systems running vulnerable nginx versions. Exploitation requires specially crafted MP4 files or specific requests targeting vulnerable modules. No known exploits in the wild have been reported at this time.
Mitigation Recommendations
Red Hat has released updated nginx packages for Red Hat Enterprise Linux 9.4 that address these vulnerabilities. Users should apply the security update as described in Red Hat advisory RHSA-2026:13839 and the referenced article https://access.redhat.com/articles/11258. No additional mitigation steps are indicated beyond applying the official patches.
Technical Details
- Gcve Source
- db.gcve.eu
- Csaf Category
- csaf_security_advisory
- Csaf Version
- 2.0
- Publisher
- Red Hat Product Security
- Advisory Id
- RHSA-2026:13839
- Cve Count
- 4
- Additional Cves
- ["CVE-2026-27654","CVE-2026-27784","CVE-2026-32647"]
- Cvss Version
- null
Threat ID: 6a3da1c74853345fc1820f0b
Added to database: 06/25/2026, 21:46:47 UTC
Last enriched: 06/25/2026, 21:59:48 UTC
Last updated: 07/31/2026, 19:24:46 UTC
Views: 24
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