WID-SEC-W-2026-0427

Vulnerability from csaf_certbund - Published: 2026-02-16 23:00 - Updated: 2026-02-19 23:00
Summary
Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen

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
Firefox ist ein Open Source Web Browser. ESR ist die Variante mit verlängertem Support. Thunderbird ist ein Open Source E-Mail Client.
Angriff
Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird ausnutzen, um falsche Informationen darzustellen oder nicht näher spezifizierte Auswirkungen zu verursachen
Betroffene Betriebssysteme
- Linux - Sonstiges - UNIX - Windows
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": "Firefox ist ein Open Source Web Browser. \r\nESR ist die Variante mit verl\u00e4ngertem Support.\r\nThunderbird ist ein Open Source E-Mail Client.",
        "title": "Produktbeschreibung"
      },
      {
        "category": "summary",
        "text": "Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Mozilla Firefox, Mozilla Firefox ESR und Mozilla Thunderbird ausnutzen, um falsche Informationen darzustellen oder nicht n\u00e4her spezifizierte Auswirkungen zu verursachen",
        "title": "Angriff"
      },
      {
        "category": "general",
        "text": "- Linux\n- Sonstiges\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-2026-0427 - CSAF Version",
        "url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0427.json"
      },
      {
        "category": "self",
        "summary": "WID-SEC-2026-0427 - Portal Version",
        "url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0427"
      },
      {
        "category": "external",
        "summary": "Mozilla Security Advisory vom 2026-02-16",
        "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-09/"
      },
      {
        "category": "external",
        "summary": "Mozilla Security Advisory vom 2026-02-16",
        "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-10/"
      },
      {
        "category": "external",
        "summary": "Mozilla Security Advisory vom 2026-02-16",
        "url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-11/"
      },
      {
        "category": "external",
        "summary": "Debian Security Advisory DSA-6143 vom 2026-02-19",
        "url": "https://lists.debian.org/debian-security-announce/2026/msg00052.html"
      },
      {
        "category": "external",
        "summary": "Ubuntu Security Notice USN-8053-1 vom 2026-02-19",
        "url": "https://ubuntu.com/security/notices/USN-8053-1"
      },
      {
        "category": "external",
        "summary": "openSUSE Security Update OPENSUSE-SU-2026:10218-1 vom 2026-02-19",
        "url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/MMSYOCXCDROVZUUKNWXZTMOTNREXXVCT/"
      }
    ],
    "source_lang": "en-US",
    "title": "Mozilla Firefox, Firefox ESR und Thunderbird: Mehrere Schwachstellen",
    "tracking": {
      "current_release_date": "2026-02-19T23:00:00.000+00:00",
      "generator": {
        "date": "2026-02-20T09:20:51.811+00:00",
        "engine": {
          "name": "BSI-WID",
          "version": "1.5.0"
        }
      },
      "id": "WID-SEC-W-2026-0427",
      "initial_release_date": "2026-02-16T23:00:00.000+00:00",
      "revision_history": [
        {
          "date": "2026-02-16T23:00:00.000+00:00",
          "number": "1",
          "summary": "Initiale Fassung"
        },
        {
          "date": "2026-02-19T23:00:00.000+00:00",
          "number": "2",
          "summary": "Neue Updates von Debian, Ubuntu und openSUSE aufgenommen"
        }
      ],
      "status": "final",
      "version": "2"
    }
  },
  "product_tree": {
    "branches": [
      {
        "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": "ios \u003c147.2.1",
                "product": {
                  "name": "Mozilla Firefox ios \u003c147.2.1",
                  "product_id": "T050937"
                }
              },
              {
                "category": "product_version",
                "name": "ios 147.2.1",
                "product": {
                  "name": "Mozilla Firefox ios 147.2.1",
                  "product_id": "T050937-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mozilla:firefox:ios__147.2.1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c147.0.4",
                "product": {
                  "name": "Mozilla Firefox \u003c147.0.4",
                  "product_id": "T050938"
                }
              },
              {
                "category": "product_version",
                "name": "147.0.4",
                "product": {
                  "name": "Mozilla Firefox 147.0.4",
                  "product_id": "T050938-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mozilla:firefox:147.0.4"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Firefox"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c115.32.1",
                "product": {
                  "name": "Mozilla Firefox ESR \u003c115.32.1",
                  "product_id": "T050939"
                }
              },
              {
                "category": "product_version",
                "name": "115.32.1",
                "product": {
                  "name": "Mozilla Firefox ESR 115.32.1",
                  "product_id": "T050939-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mozilla:firefox_esr:115.32.1"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c140.7.1",
                "product": {
                  "name": "Mozilla Firefox ESR \u003c140.7.1",
                  "product_id": "T050940"
                }
              },
              {
                "category": "product_version",
                "name": "140.7.1",
                "product": {
                  "name": "Mozilla Firefox ESR 140.7.1",
                  "product_id": "T050940-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mozilla:firefox_esr:140.7.1"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Firefox ESR"
          },
          {
            "branches": [
              {
                "category": "product_version_range",
                "name": "\u003c140.7.2",
                "product": {
                  "name": "Mozilla Thunderbird \u003c140.7.2",
                  "product_id": "T050941"
                }
              },
              {
                "category": "product_version",
                "name": "140.7.2",
                "product": {
                  "name": "Mozilla Thunderbird 140.7.2",
                  "product_id": "T050941-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mozilla:thunderbird:140.7.2"
                  }
                }
              },
              {
                "category": "product_version_range",
                "name": "\u003c147.0.2",
                "product": {
                  "name": "Mozilla Thunderbird \u003c147.0.2",
                  "product_id": "T050942"
                }
              },
              {
                "category": "product_version",
                "name": "147.0.2",
                "product": {
                  "name": "Mozilla Thunderbird 147.0.2",
                  "product_id": "T050942-fixed",
                  "product_identification_helper": {
                    "cpe": "cpe:/a:mozilla:thunderbird:147.0.2"
                  }
                }
              }
            ],
            "category": "product_name",
            "name": "Thunderbird"
          }
        ],
        "category": "vendor",
        "name": "Mozilla"
      },
      {
        "branches": [
          {
            "category": "product_name",
            "name": "SUSE openSUSE",
            "product": {
              "name": "SUSE openSUSE",
              "product_id": "T027843",
              "product_identification_helper": {
                "cpe": "cpe:/o:suse:opensuse:-"
              }
            }
          }
        ],
        "category": "vendor",
        "name": "SUSE"
      },
      {
        "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-2026-2032",
      "product_status": {
        "known_affected": [
          "T050937",
          "2951",
          "T000126",
          "T027843"
        ]
      },
      "release_date": "2026-02-16T23:00:00.000+00:00",
      "title": "CVE-2026-2032"
    },
    {
      "cve": "CVE-2026-2447",
      "product_status": {
        "known_affected": [
          "T050938",
          "2951",
          "T050942",
          "T000126",
          "T027843",
          "T050941",
          "T050940",
          "T050939"
        ]
      },
      "release_date": "2026-02-16T23:00:00.000+00:00",
      "title": "CVE-2026-2447"
    }
  ]
}


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Sightings

Author Source Type Date

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.