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nginx 1.31.6: known vulnerabilities

Known vulnerabilities affecting nginx 1.31.6: 5. Compare the fixes below with your installed release.

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Vulnerabilities: 5

  1. CVE-2026-95101

    Medium · CVSS 6.9EPSS 0.25%Fix available

    NGINX ngx_http_v3_module vulnerability

    Description NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_v3_module module. When using HTTP/3 with proxy_request_buffering on directive, an unauthenticated attacker may be able to inject data in the proxied request. Impact This vulnerability may allow remote attackers to inject data in the proxied request.  There is no control plane exposure; this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

    nginxWeb servers
    • Update to 1.31.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

  2. CVE-2026-97205

    Critical · CVSS 9.2EPSS 0.48%Fix available

    NGINX ngx_http_core_module vulnerability

    NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_core_module module. When asynchronous file I/O (AIO) is enabled in certain configurations, processing a Server Side Includes (SSI) page containing “include virtual” commands may trigger a Use-After-Free (UAF) in the NGINX worker process. This may cause memory corruption or a worker process crash. Additionally, attackers can execute code on systems with Address Space Layout Randomization (ASLR) disabled or when the attacker can bypass ASLR. Impact: This vulnerability may allow remote attackers to cause a denial-of-service (DoS) on the NGINX system, corrupt its memory, or po

    nginxWeb servers
    • Update to 1.31.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

  3. CVE-2026-93479

    Critical · CVSS 9.2EPSS 0.55%Fix available

    NGINX map directive and regex matching vulnerability

    A vulnerability exists in NGINX Plus and NGINX Open Source when a map directive uses regex matching and the root directive or access log format references the map's regex capture variables before referencing the map output variable. Alternatively, the same result could be achieved by using a non-cacheable variable in a string expression under certain conditions. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Addr

    nginxWeb servers
    • Update to 1.31.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

  4. CVE-2026-97629

    High · CVSS 8.3EPSS 0.18%Fix available

    NGINX ngx_http_ssl_module vulnerability

    Description When NGINX Plus or NGINX Open Source is configured with ssl_session_cache shared:name:size without an explicit ssl_session_ticket_key file directives to automatically rotate SSL session ticket keys, a remote unauthenticated attacker is able to forge client SSL sessions in a non-deterministic manner that is beyond the attacker's control. An attacker could leverage this vulnerability to bypass verification of client certificates. Impact This vulnerability can lead to the exposure of resources or functionality to unintended actors, possibly providing attackers with access to sensitive information. There is no control plane ex

    nginxWeb servers
    • Update to 1.31.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

  5. CVE-2026-15176

    Critical · CVSS 9.2EPSS 0.52%Fix available

    NGINX ngx_http_core_module vulnerability

    A vulnerability exists in NGINX Plus and NGINX Open Source when a location is configured that uses the alias directive together with rewrite and a set or return directive referencing the $request_filename variable. Alternatively, the same result could be achieved when the $request_filename variable is used in an access log format directive. An unauthenticated attacker along with conditions beyond their control can exploit this vulnerability by sending crafted HTTP requests. This may cause a heap buffer overflow in the NGINX worker process leading to a restart. Additionally, attackers can execute code on systems with Address Space Layout Rando

    nginxWeb servers
    • Update to 1.31.7
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗

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