WID-SEC-W-2026-1661

Vulnerability from csaf_certbund - Published: 2026-05-25 22:00 - Updated: 2026-06-08 22:00
Summary
NGINX Open Source und NGINX Plus: Schwachstelle ermöglicht Denial of Service und potenziell Codeausführung
Severity
Hoch
Notes
Das BSI ist als Anbieter für die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch dafür verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgfältig im Einzelfall zu prüfen.
Produktbeschreibung: NGINX ist eine Webserver-, Reverse Proxy- und E-Mail-Proxy Software. NGINX Plus ist die kommerzielle Variante von NGINX, einer Webserver-, Reverse Proxy- und E-Mail Proxy Software.
Angriff: Ein entfernter, anonymer Angreifer kann eine Schwachstelle in NGINX und NGINX NGINX Plus ausnutzen, um einen Denial of Service Angriff durchzuführen, und potenziell um beliebigen Programmcode auszuführen.
Betroffene Betriebssysteme: - Linux - UNIX - Windows
CVE-2026-9256
Affected products
Product Identifier Version Remediation
NGINX NGINX Plus <R32 P7
NGINX / NGINX Plus
 <R32 P7
NGINX NGINX Plus <R36 P5
NGINX / NGINX Plus
 <R36 P5
NGINX NGINX Plus <37.0.1.1
NGINX / NGINX Plus
 <37.0.1.1
Debian Linux
Debian
 cpe:/o:debian:debian_linux:- —
Ubuntu Linux
Ubuntu
 cpe:/o:canonical:ubuntu_linux:- —
NGINX NGINX Open Source <1.30.2
NGINX / NGINX
 Open Source <1.30.2
Amazon Linux 2
Amazon
 cpe:/o:amazon:linux_2:- —
NGINX NGINX Open Source <1.31.1
NGINX / NGINX
 Open Source <1.31.1
References
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "text": "hoch"
    },
    "category": "csaf_base",
    "csaf_version": "2.0",
    "distribution": {
      "tlp": {
        "label": "WHITE",
        "url": "https://www.first.org/tlp/"
      }
    },
    "lang": "de-DE",
    "notes": [
      {
        "category": "legal_disclaimer",
        "text": "Das BSI ist als Anbieter f\u00fcr die eigenen, zur Nutzung bereitgestellten Inhalte nach den allgemeinen Gesetzen verantwortlich. Nutzerinnen und Nutzer sind jedoch daf\u00fcr verantwortlich, die Verwendung und/oder die Umsetzung der mit den Inhalten bereitgestellten Informationen sorgf\u00e4ltig im Einzelfall zu pr\u00fcfen."
      },
      {
        "category": "description",
        "text": "NGINX ist eine Webserver-, Reverse Proxy- und E-Mail-Proxy Software.\r\nNGINX Plus ist die kommerzielle Variante von NGINX, einer Webserver-, Reverse Proxy- und E-Mail Proxy Software.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann eine Schwachstelle in NGINX und NGINX NGINX Plus ausnutzen, um einen Denial of Service Angriff durchzuf\u00fchren, und potenziell um beliebigen Programmcode auszuf\u00fchren.",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- UNIX\n- Windows",
        "title": "Betroffene Betriebssysteme"
      }
    ],
    "publisher": {
      "category": "other",
      "contact_details": "csaf-provider@cert-bund.de",
      "name": "Bundesamt f\u00fcr Sicherheit in der Informationstechnik",
      "namespace": "https://www.bsi.bund.de"
    },
    "references": [
      {
        "category": "self",
        "summary": "WID-SEC-W-2026-1661 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1661.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-1661 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-1661"
      },
      {
        "category": "external",
        "summary": "F5 Security Advisory K000161377 vom 2026-05-25",
        "url": "https://my.f5.com/manage/s/article/K000161377"
      },
      {
        "category": "external",
        "summary": "EUVD Security Advisory vom 2026-05-25",
        "url": "https://euvd.enisa.europa.eu/enisa/EUVD-2026-31444"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8354-1 vom 2026-06-01",
        "url": "https://ubuntu.com/security/notices/USN-8354-1"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8375-1 vom 2026-06-03",
        "url": "https://ubuntu.com/security/notices/USN-8375-1"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-6326 vom 2026-06-07",
        "url": "https://security-tracker.debian.org/tracker/DSA-6326-1"
      },
      {
        "category": "external",
        "summary": "Amazon Linux Security Advisory ALAS2NGINX1-2026-013 vom 2026-06-08",
        "url": "https://alas.aws.amazon.com/AL2/ALAS2NGINX1-2026-013.html"
      }
    ],
    "source_lang": "en-US",
    "title": "NGINX Open Source und NGINX Plus: Schwachstelle erm\u00f6glicht Denial of Service und potenziell Codeausf\u00fchrung",
    "tracking": {
      "current_release_date": "2026-06-08T22:00:00.000+00:00",
      "generator": {
        "date": "2026-06-09T08:41:59.372+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.6.0"
        }
      },
      "id": "WID-SEC-W-2026-1661",
      "initial_release_date": "2026-05-25T22:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-05-25T22:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-06-01T22:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2026-06-04T22:00:00.000+00:00",
          "number": "3",
          "summary": "Neue Updates von Ubuntu aufgenommen"
        },
        {
          "date": "2026-06-07T22:00:00.000+00:00",
          "number": "4",
          "summary": "Neue Updates von Debian aufgenommen"
        },
        {
          "date": "2026-06-08T22:00:00.000+00:00",
          "number": "5",
          "summary": "Neue Updates von Amazon aufgenommen"
        }
      ],
      "status": "final",
      "version": "5"
    }
  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Amazon Linux 2",
            "product": {
              "name": "Amazon Linux 2",
              "product_id": "398363",
              "product_identification_helper": {
                "cpe": "cpe:/o:amazon:linux_2:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Amazon"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Debian Linux",
            "product": {
              "name": "Debian Linux",
              "product_id": "2951",
              "product_identification_helper": {
                "cpe": "cpe:/o:debian:debian_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Debian"
      },
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "Open Source \u003c1.31.1",
                "product": {
                  "name": "NGINX NGINX Open Source \u003c1.31.1",
                  "product_id": "T054558"
                }
              },
              {
                "category": "product_version",
                "name": "Open Source 1.31.1",
                "product": {
                  "name": "NGINX NGINX Open Source 1.31.1",
                  "product_id": "T054558-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nginx:nginx:open_source__1.31.1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "Open Source \u003c1.30.2",
                "product": {
                  "name": "NGINX NGINX Open Source \u003c1.30.2",
                  "product_id": "T054559"
                }
              },
              {
                "category": "product_version",
                "name": "Open Source 1.30.2",
                "product": {
                  "name": "NGINX NGINX Open Source 1.30.2",
                  "product_id": "T054559-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nginx:nginx:open_source__1.30.2"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "NGINX"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c37.0.1.1",
                "product": {
                  "name": "NGINX NGINX Plus \u003c37.0.1.1",
                  "product_id": "T054560"
                }
              },
              {
                "category": "product_version",
                "name": "37.0.1.1",
                "product": {
                  "name": "NGINX NGINX Plus 37.0.1.1",
                  "product_id": "T054560-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nginx:nginx_plus:37.0.1.1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003cR36 P5",
                "product": {
                  "name": "NGINX NGINX Plus \u003cR36 P5",
                  "product_id": "T054561"
                }
              },
              {
                "category": "product_version",
                "name": "R36 P5",
                "product": {
                  "name": "NGINX NGINX Plus R36 P5",
                  "product_id": "T054561-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nginx:nginx_plus:r36_p5"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003cR32 P7",
                "product": {
                  "name": "NGINX NGINX Plus \u003cR32 P7",
                  "product_id": "T054562"
                }
              },
              {
                "category": "product_version",
                "name": "R32 P7",
                "product": {
                  "name": "NGINX NGINX Plus R32 P7",
                  "product_id": "T054562-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:nginx:nginx_plus:r32_p7"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "NGINX Plus"
          }
        ],
        "category": "vendor",
        "name": "NGINX"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "Ubuntu Linux",
            "product": {
              "name": "Ubuntu Linux",
              "product_id": "T000126",
              "product_identification_helper": {
                "cpe": "cpe:/o:canonical:ubuntu_linux:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "Ubuntu"
      }
    ]
  },
  "vulnerabilities": [
    {
      "cve": "CVE-2026-9256",
      "product_status": {
        "known_affected": [
          "T054562",
          "T054561",
          "T054560",
          "2951",
          "T000126",
          "T054559",
          "398363",
          "T054558"
        ]
      },
      "release_date": "2026-05-25T22:00:00.000+00:00",
      "title": "CVE-2026-9256"
    }
  ]
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.