WID-SEC-W-2026-0997
Vulnerability from csaf_certbund - Published: 2026-04-07 22:00 - Updated: 2026-04-09 22:00Summary
Mozilla Firefox und Thunderbird: Mehrere Schwachstellen
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: Firefox ist ein Open Source Web Browser.
ESR ist die Variante mit verlängertem Support.
Thunderbird ist ein Open Source E-Mail Client.
Angriff: Ein Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbird ausnutzen, um einen Denial-of-Service-Zustand herbeizuführen, beliebigen Code auszuführen oder andere, nicht näher spezifizierte Angriffe durchzuführen.
Betroffene Betriebssysteme: - Android
- iPhoneOS
- MacOS X
- Sonstiges
- UNIX
- Windows
References
{
"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 Angreifer kann mehrere Schwachstellen in Mozilla Firefox und Mozilla Thunderbird ausnutzen, um einen Denial-of-Service-Zustand herbeizuf\u00fchren, beliebigen Code auszuf\u00fchren oder andere, nicht n\u00e4her spezifizierte Angriffe durchzuf\u00fchren.",
"title": "Angriff"
},
{
"category": "general",
"text": "- Android\n- iPhoneOS\n- MacOS X\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-2026-0997 - CSAF Version",
"url": "https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-0997.json"
},
{
"category": "self",
"summary": "WID-SEC-2026-0997 - Portal Version",
"url": "https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-0997"
},
{
"category": "external",
"summary": "Mozilla Security Advisory MFSA 2026-25 Security Vulnerabilities fixed in Firefox 149.0.2 vom 2026-04-07",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-25/"
},
{
"category": "external",
"summary": "Mozilla Security Advisory MFSA 2026-26 Security Vulnerabilities fixed in Firefox ESR 115.34.1 vom 2026-04-07",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-26/"
},
{
"category": "external",
"summary": "Mozilla Security Advisory MFSA 2026-27 Security Vulnerabilities fixed in Firefox ESR 140.9.1 vom 2026-04-07",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-27/"
},
{
"category": "external",
"summary": "Mozilla Security Advisory MFSA 2026-28 Security Vulnerabilities fixed in Thunderbird 149.0.2 vom 2026-04-07",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-28/"
},
{
"category": "external",
"summary": "Mozilla Security Advisory MFSA 2026-29 Security Vulnerabilities fixed in Thunderbird 140.9.1 vom 2026-04-07",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-29/"
},
{
"category": "external",
"summary": "Debian Security Advisory DSA-6202 vom 2026-04-08",
"url": "https://lists.debian.org/debian-security-announce/2026/msg00112.html"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:10503-1 vom 2026-04-09",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/PTRDAEGUXD3AWAVJMNQHBTJSF46GEBLX/"
},
{
"category": "external",
"summary": "openSUSE Security Update OPENSUSE-SU-2026:10501-1 vom 2026-04-09",
"url": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/JEKBDG6VTF2J5KBSXUAZRCQ3BDEUDKVP/"
}
],
"source_lang": "en-US",
"title": "Mozilla Firefox und Thunderbird: Mehrere Schwachstellen",
"tracking": {
"current_release_date": "2026-04-09T22:00:00.000+00:00",
"generator": {
"date": "2026-04-10T07:04:34.147+00:00",
"engine": {
"name": "BSI-WID",
"version": "1.5.0"
}
},
"id": "WID-SEC-W-2026-0997",
"initial_release_date": "2026-04-07T22:00:00.000+00:00",
"revision_history": [
{
"date": "2026-04-07T22:00:00.000+00:00",
"number": "1",
"summary": "Initiale Fassung"
},
{
"date": "2026-04-08T22:00:00.000+00:00",
"number": "2",
"summary": "Neue Updates von Debian aufgenommen"
},
{
"date": "2026-04-09T22:00:00.000+00:00",
"number": "3",
"summary": "Neue Updates von openSUSE aufgenommen"
}
],
"status": "final",
"version": "3"
}
},
"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": "\u003c149.0.2",
"product": {
"name": "Mozilla Firefox \u003c149.0.2",
"product_id": "T052476"
}
},
{
"category": "product_version",
"name": "149.0.2",
"product": {
"name": "Mozilla Firefox 149.0.2",
"product_id": "T052476-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:firefox:149.0.2"
}
}
}
],
"category": "product_name",
"name": "Firefox"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c115.34.1",
"product": {
"name": "Mozilla Firefox ESR \u003c115.34.1",
"product_id": "T052477"
}
},
{
"category": "product_version",
"name": "115.34.1",
"product": {
"name": "Mozilla Firefox ESR 115.34.1",
"product_id": "T052477-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:firefox_esr:115.34.1"
}
}
},
{
"category": "product_version_range",
"name": "\u003c140.9.1",
"product": {
"name": "Mozilla Firefox ESR \u003c140.9.1",
"product_id": "T052478"
}
},
{
"category": "product_version",
"name": "140.9.1",
"product": {
"name": "Mozilla Firefox ESR 140.9.1",
"product_id": "T052478-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:firefox_esr:140.9.1"
}
}
}
],
"category": "product_name",
"name": "Firefox ESR"
},
{
"branches": [
{
"category": "product_version_range",
"name": "\u003c149.0.2",
"product": {
"name": "Mozilla Thunderbird \u003c149.0.2",
"product_id": "T052479"
}
},
{
"category": "product_version",
"name": "149.0.2",
"product": {
"name": "Mozilla Thunderbird 149.0.2",
"product_id": "T052479-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:thunderbird:149.0.2"
}
}
},
{
"category": "product_version_range",
"name": "\u003c140.9.1",
"product": {
"name": "Mozilla Thunderbird \u003c140.9.1",
"product_id": "T052480"
}
},
{
"category": "product_version",
"name": "140.9.1",
"product": {
"name": "Mozilla Thunderbird 140.9.1",
"product_id": "T052480-fixed",
"product_identification_helper": {
"cpe": "cpe:/a:mozilla:thunderbird:140.9.1"
}
}
}
],
"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"
}
]
},
"vulnerabilities": [
{
"cve": "CVE-2026-5731",
"product_status": {
"known_affected": [
"2951",
"T052480",
"T027843",
"T052478",
"T052479",
"T052476",
"T052477"
]
},
"release_date": "2026-04-07T22:00:00.000+00:00",
"title": "CVE-2026-5731"
},
{
"cve": "CVE-2026-5732",
"product_status": {
"known_affected": [
"2951",
"T052480",
"T027843",
"T052478",
"T052479",
"T052476",
"T052477"
]
},
"release_date": "2026-04-07T22:00:00.000+00:00",
"title": "CVE-2026-5732"
},
{
"cve": "CVE-2026-5733",
"product_status": {
"known_affected": [
"2951",
"T052480",
"T027843",
"T052478",
"T052479",
"T052476",
"T052477"
]
},
"release_date": "2026-04-07T22:00:00.000+00:00",
"title": "CVE-2026-5733"
},
{
"cve": "CVE-2026-5734",
"product_status": {
"known_affected": [
"2951",
"T052480",
"T027843",
"T052478",
"T052479",
"T052476",
"T052477"
]
},
"release_date": "2026-04-07T22:00:00.000+00:00",
"title": "CVE-2026-5734"
},
{
"cve": "CVE-2026-5735",
"product_status": {
"known_affected": [
"2951",
"T052480",
"T027843",
"T052478",
"T052479",
"T052476",
"T052477"
]
},
"release_date": "2026-04-07T22:00:00.000+00:00",
"title": "CVE-2026-5735"
}
]
}
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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.
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