ESB-2026.3364 — Vulnetix

ESB-2026.3364 PUBLISHED CVSS 8.199999809265137 HIGH

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.3364 nginx security update 8 April 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: nginx Publisher: Red Hat Operating System: Red Hat Resolution: Patch/Upgrade CVE Names: CVE-2026-27651 CVE-2026-27654 CVE-2026-32647 CVE-2026-27784 Original Bulletin: https://access.redhat.com/errata/RHSA-2026:6906 Comment: CVSS (Max): 8.2 CVE-2026-27654 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H) CVSS Source: Red Hat Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H EPSS (Max): 0.0% (12th) CVE-2026-27651 2026-04-07 - --------------------------BEGIN INCLUDED TEXT-------------------- RHSA-2026:6906 - Security Advisory Issued: 2026-04-07 Updated: 2026-04-07 Synopsis Nginx security update Type/Severity Security Advisory: Important Topic An update for nginx is now available for Red Hat Enterprise Linux 10. Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section. 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): o nginx: NGINX: Denial of Service or Code Execution via specially crafted MP4 files (CVE-2026-32647) o NGINX: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module (CVE-2026-27654) o NGINX: NGINX: Denial of Service due to memory corruption via crafted MP4 file (CVE-2026-27784) o 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. Solution For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 Affected Products o Red Hat Enterprise Linux for x86_64 10 x86_64 o Red Hat Enterprise Linux for IBM z Systems 10 s390x o Red Hat Enterprise Linux for Power, little endian 10 ppc64le o Red Hat Enterprise Linux for ARM 64 10 aarch64 o Red Hat CodeReady Linux Builder for x86_64 10 x86_64 o Red Hat CodeReady Linux Builder for Power, little endian 10 ppc64le o Red Hat CodeReady Linux Builder for ARM 64 10 aarch64 o Red Hat CodeReady Linux Builder for IBM z Systems 10 s390x Fixes o BZ - 2449598 - CVE-2026-32647 nginx: NGINX: Denial of Service or Code Execution via specially crafted MP4 files o BZ - 2450776 - CVE-2026-27654 NGINX: NGINX: Denial of Service or file modification via buffer overflow in ngx_http_dav_module o BZ - 2450785 - CVE-2026-27784 NGINX: NGINX: Denial of Service due to memory corruption via crafted MP4 file o BZ - 2450791 - CVE-2026-27651 NGINX: NGINX: Denial of Service via undisclosed requests when ngx_mail_auth_http_module is enabled CVEs o CVE-2026-27651 o CVE-2026-27654 o CVE-2026-27784 o CVE-2026-32647 References o https://access.redhat.com/security/updates/classification/#important - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AUSCERT's members. As AUSCERT did not write the document quoted above, AUSCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AUSCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://portal.auscert.org.au/bulletins/ =========================================================================== AUSCERT The University of Queensland, Brisbane QLD 4072 Australia e: auscert@auscert.org.au t: +61 (0)7 3365 4417 Allies in Cyber Security ===========================================================================

Risk Scores

CVSS v3.1

8.199999809265137

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H

Affected Products

Vendor	Product	Versions
Red Hat	nginx

Timeline

Apr 7, 2026 CVE Published
Apr 8, 2026 Distribution Patch

References

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