This update for nginx fixes the following issues

- CVE-2026-27651: denial of service via undisclosed requests when the `ngx_mail_auth_http_module` is enabled
  (bsc#1260415).
- CVE-2026-32647: NGINX worker memory over-read or over-write via a specially crafted MP4 file (bsc#1260420).
- CVE-2026-40701: heap use-after-free in the worker process when the `ssl_verify_client` and the `ssl_ocsp` directives
  are set due to issue in the `ngx_http_ssl_module` module (bsc#1265229).
- CVE-2026-42934: heap buffer overread in the worker process due to issue in the `ngx_http_charset_module` module
  (bsc#1265231).
- CVE-2026-42945: heap buffer overflow via crafted HTTP requests due to issue in `ngx_http_rewrite_module`
  (bsc#1265232).
- CVE-2026-42946: excessive memory allocation and data overread due to issue in the `ngx_http_scgi_module` and
  `ngx_http_uwsgi_module` modules (bsc#1265233).

Security update for nginx

Multiple security vulnerabilities have been identified and fixed in the nginx 1.26 module for Red Hat Enterprise Linux 9.6. These include denial of service and potential code execution via specially crafted MP4 files, buffer overflow leading to denial of service or file modification in the ngx_http_dav_module, memory corruption causing denial of service via crafted MP4 files, and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled. The update addresses these issues to improve the security of nginx deployments on affected Red Hat platforms.

Red Hat Security Advisory: nginx:1.26 security update

Multiple security vulnerabilities have been identified in nginx version 1.24 as used in Red Hat Enterprise Linux 9.6 Extended Update Support. These include denial of service and potential code execution via specially crafted MP4 files, buffer overflow in the ngx_http_dav_module leading to denial of service or file modification, memory corruption via crafted MP4 files causing denial of service, and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled. Red Hat has issued an important security advisory with updates to address these issues.

Red Hat Security Advisory: nginx:1.24 security update

Multiple security vulnerabilities have been identified in the nginx 1.24 module used in Red Hat Enterprise Linux 9.4 Extended Update Support. These include denial of service and potential code execution via specially crafted MP4 files, buffer overflow leading to denial of service or file modification in the ngx_http_dav_module, memory corruption causing denial of service via crafted MP4 files, and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled. Red Hat has issued an important security advisory with updates addressing these issues.

Multiple security vulnerabilities have been identified in nginx, a widely used web and proxy server. These include denial of service and potential code execution via specially crafted MP4 files, buffer overflow leading to denial of service or file modification in the ngx_http_dav_module, and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled. Red Hat has issued an important security advisory with updates addressing these issues for Red Hat Enterprise Linux 9.0 Update Services for SAP Solutions.

Red Hat Security Advisory: nginx security update

Multiple security vulnerabilities have been identified in nginx, a widely used web and proxy server. These include denial of service and potential code execution via specially crafted MP4 files, buffer overflow leading to denial of service or file modification in the ngx_http_dav_module, and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled. Red Hat has issued an important security advisory for nginx on Red Hat Enterprise Linux 9.2, providing updates that address these issues.

nginx

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.

Multiple security vulnerabilities have been identified in nginx version 1.26 as used in Red Hat Enterprise Linux 9. These include denial of service and potential code execution via specially crafted MP4 files, buffer overflow leading to denial of service or file modification in the ngx_http_dav_module, and denial of service when the ngx_mail_auth_http_module is enabled. Red Hat has released an important security update addressing these issues.

Multiple security vulnerabilities have been identified in the nginx 1.24 module used in Red Hat Enterprise Linux 9. These include denial of service and code execution risks via specially crafted MP4 files, buffer overflow leading to denial of service or file modification in the ngx_http_dav_module, memory corruption from crafted MP4 files, and denial of service when the ngx_mail_auth_http_module is enabled. Red Hat has issued an important security advisory with updates to address these issues.

Multiple security vulnerabilities affecting nginx 1.24 on Red Hat Enterprise Linux 8 have been addressed in an important security update. These include denial of service and potential code execution via specially crafted MP4 files, buffer overflow leading to denial of service or file modification in the ngx_http_dav_module, memory corruption causing denial of service via crafted MP4 files, and denial of service via undisclosed requests when the ngx_mail_auth_http_module is enabled. The update mitigates these issues by applying patches to the affected modules.

When the ngx_mail_auth_http_module module is enabled on NGINX Plus or NGINX Open Source, undisclosed requests can cause worker processes to terminate. This issue may occur when (1) CRAM-MD5 or APOP authentication is enabled, and (2) the authentication server permits retry by returning the Auth-Wait response header. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

Search: CVE-2026-27651