{
  "document": {
    "aggregate_severity": {
      "text": "Important"
    },
    "category": "csaf_security_advisory",
    "csaf_version": "2.0",
    "distribution": {
      "text": "TuxCare License Agreement",
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "en",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Cloud Linux Inc. and provide a link to the original.",
        "title": "Terms of Use"
      },
      {
        "category": "details",
        "text": "* SECURITY UPDATE: use-after-free in the worker process when Server-Side\n     Includes were used together with proxy_pass and proxy_buffering off,\n     where a subrequest created for an SSI include while another include had\n     data postponed was posted twice, once from ngx_http_subrequest() and once\n     from ngx_http_postpone_filter(), so a quick finalization ran in both\n     calls and decremented r->main->count more times than it had been\n     incremented, letting an attacker with a man-in-the-middle position on the\n     upstream side achieve a limited modification of worker process memory or\n     a restart of the worker process\n     - debian/patches/CVE-2026-56434.patch: return early instead of appending\n       a request that is already present in the posted_requests list in\n       ngx_http_post_request(), and reset r->write_event_handler to\n       ngx_http_request_empty_handler during active subrequest finalization in\n       ngx_http_finalize_request() in src/http/ngx_http_request.c\n     - CVE-2026-56434",
        "title": "Details"
      }
    ],
    "publisher": {
      "category": "vendor",
      "contact_details": "https://tuxcare.com/contact/",
      "name": "TuxCare",
      "namespace": "https://tuxcare.com/"
    },
    "references": [
      {
        "category": "self",
        "summary": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1785773210",
        "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1785773210"
      },
      {
        "category": "self",
        "summary": "Canonical URL",
        "url": "https://security.tuxcare.com/csaf/v2/els_docker/debian12/advisories/2026/clsa-2026_1785773210.json"
      }
    ],
    "tracking": {
      "current_release_date": "2026-08-03T16:07:48Z",
      "generator": {
        "date": "2026-08-03T16:07:48Z",
        "engine": {
          "name": "pyCSAF"
        }
      },
      "id": "CLSA-2026:1785773210",
      "initial_release_date": "2026-08-03T16:07:48Z",
      "revision_history": [
        {
          "date": "2026-08-03T16:07:48Z",
          "number": "1",
          "summary": "Initial version"
        }
      ],
      "status": "final",
      "version": "1"
    },
    "title": "Fix CVE(s): CVE-2026-1642, CVE-2026-42055, CVE-2026-42946, CVE-2026-56434"
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          "title": "Vulnerability description"
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          "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els5.arm64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els-docker/cve/CVE-2026-42055"
        },
        {
          "category": "external",
          "summary": "https://my.f5.com/manage/s/article/K000161584",
          "url": "https://my.f5.com/manage/s/article/K000161584"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:27197",
          "url": "https://access.redhat.com/errata/RHSA-2026:27197"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:36331",
          "url": "https://access.redhat.com/errata/RHSA-2026:36331"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:36364",
          "url": "https://access.redhat.com/errata/RHSA-2026:36364"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:36618",
          "url": "https://access.redhat.com/errata/RHSA-2026:36618"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:36639",
          "url": "https://access.redhat.com/errata/RHSA-2026:36639"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:38847",
          "url": "https://access.redhat.com/errata/RHSA-2026:38847"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:44481",
          "url": "https://access.redhat.com/errata/RHSA-2026:44481"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/errata/RHSA-2026:46836",
          "url": "https://access.redhat.com/errata/RHSA-2026:46836"
        },
        {
          "category": "external",
          "summary": "https://access.redhat.com/security/cve/CVE-2026-42055",
          "url": "https://access.redhat.com/security/cve/CVE-2026-42055"
        },
        {
          "category": "external",
          "summary": "https://bugzilla.redhat.com/show_bug.cgi?id=2489866",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2489866"
        },
        {
          "category": "external",
          "summary": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42055.json",
          "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-42055.json"
        }
      ],
      "release_date": "2026-06-17T15:16:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-03T16:06:53.211145Z",
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          "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1785773210"
        },
        {
          "category": "none_available",
          "date": "2026-06-17T15:16:00Z",
          "details": "Affected",
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els2.arm64",
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els5.arm64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    },
    {
      "cve": "CVE-2026-1642",
      "cwe": {
        "id": "CWE-349",
        "name": "Acceptance of Extraneous Untrusted Data With Trusted Data"
      },
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability exists in NGINX OSS and NGINX Plus when configured to proxy to upstream Transport Layer Security (TLS) servers. An attacker with a man-in-the-middle (MITM) position on the upstream server side—along with conditions beyond the attacker's control—may be able to inject plain text data into the response from an upstream proxied server.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
      "product_status": {
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els-docker/cve/CVE-2026-1642"
        },
        {
          "category": "external",
          "summary": "https://my.f5.com/manage/s/article/K000159824",
          "url": "https://my.f5.com/manage/s/article/K000159824"
        },
        {
          "category": "external",
          "summary": "http://www.openwall.com/lists/oss-security/2026/02/05/1",
          "url": "http://www.openwall.com/lists/oss-security/2026/02/05/1"
        }
      ],
      "release_date": "2026-02-04T15:16:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-03T16:06:53.211145Z",
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          ],
          "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1785773210"
        },
        {
          "category": "none_available",
          "date": "2026-02-04T15:16:00Z",
          "details": "Affected",
          "product_ids": [
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els10.amd64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els10.arm64",
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els12.arm64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els13.amd64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els13.arm64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els15.amd64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els15.arm64",
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els2.arm64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els5.amd64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els5.arm64"
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        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "products": [
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els18.arm64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ]
    },
    {
      "cve": "CVE-2026-56434",
      "cwe": {
        "id": "CWE-416",
        "name": "Use After Free"
      },
      "notes": [
        {
          "category": "description",
          "text": "NGINX Plus and NGINX Open Source have a vulnerability in the ngx_http_ssi_module module. This vulnerability may exist when the Server-Side Includes (SSI), proxy_pass, and proxy_buffering off directives are configured. With this configuration, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to cause a use-after-free in the NGINX worker process. This issue may lead to limited modification of memory or a restart of the NGINX worker process.\n\nImpact:\nThis vulnerability may allow remote attackers to have limited control to modify memory contents or restart the NGINX worker process. There is no control plane exposure; this is a data plane issue only.\n\nNote: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
          "title": "Vulnerability description"
        }
      ],
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          "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els5.arm64"
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      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els-docker/cve/CVE-2026-56434"
        },
        {
          "category": "external",
          "summary": "https://my.f5.com/manage/s/article/K000162098",
          "url": "https://my.f5.com/manage/s/article/K000162098"
        }
      ],
      "release_date": "2026-07-15T15:16:00Z",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-08-03T16:06:53.211145Z",
          "details": "Details on how to apply the fix are available at: https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1785773210",
          "product_ids": [
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els18.arm64"
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          "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1785773210"
        },
        {
          "category": "none_available",
          "date": "2026-07-15T15:16:00Z",
          "details": "Affected",
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els10.amd64",
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          "details": "Important"
        }
      ]
    },
    {
      "cve": "CVE-2026-42946",
      "cwe": {
        "id": "CWE-789",
        "name": "Memory Allocation with Excessive Size Value"
      },
      "notes": [
        {
          "category": "description",
          "text": "A vulnerability exists in the ngx_http_scgi_module and ngx_http_uwsgi_module modules that may result in excessive memory allocation or an over-read of data. When scgi_pass or uwsgi_pass is configured, an unauthenticated attacker with man-in-the-middle (MITM) ability to control responses from an upstream server may be able to read the memory of the NGINX worker process or restart it.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.",
          "title": "Vulnerability description"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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      "references": [
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          "category": "self",
          "summary": "Canonical URL",
          "url": "https://cve.tuxcare.com/els-docker/cve/CVE-2026-42946"
        },
        {
          "category": "external",
          "summary": "https://my.f5.com/manage/s/article/K000161027",
          "url": "https://my.f5.com/manage/s/article/K000161027"
        }
      ],
      "release_date": "2026-05-13T16:16:00Z",
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          "url": "https://cve.tuxcare.com/els-docker/releases/CLSA-2026:1785773210"
        },
        {
          "category": "none_available",
          "date": "2026-05-13T16:16:00Z",
          "details": "Affected",
          "product_ids": [
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els10.amd64",
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            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els12.arm64",
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      "scores": [
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "products": [
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els18.amd64",
            "Debian-12:nginx1.27-0:1.27.5-1~bookworm+tuxcare.els18.arm64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ]
    }
  ]
}