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CERTFR-2026-AVI-0480
Vulnerability from certfr_avis - Published: 2026-04-22 - Updated: 2026-04-22
De multiples vulnérabilités ont été découvertes dans les produits Mozilla. Certaines d'entre elles permettent à un attaquant de provoquer une exécution de code arbitraire à distance, une élévation de privilèges et un déni de service à distance.
Solutions
Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).
Impacted products
| Vendor | Product | Description | ||
|---|---|---|---|---|
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 140.10 | ||
| Mozilla | Firefox | Firefox versions antérieures à 150 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 115.35 | ||
| Mozilla | Thunderbird | Thunderbird versions antérieures à 150 | ||
| Mozilla | Thunderbird | Thunderbird versions antérieures à 140.10 |
References
| Title | Publication Time | Tags | |||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 140.10",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox versions ant\u00e9rieures \u00e0 150",
"product": {
"name": "Firefox",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 115.35",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird versions ant\u00e9rieures \u00e0 150",
"product": {
"name": "Thunderbird",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird versions ant\u00e9rieures \u00e0 140.10",
"product": {
"name": "Thunderbird",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
}
],
"affected_systems_content": "",
"content": "## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l\u0027\u00e9diteur pour l\u0027obtention des correctifs (cf. section Documentation).",
"cves": [
{
"name": "CVE-2026-6772",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6772"
},
{
"name": "CVE-2026-6747",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6747"
},
{
"name": "CVE-2026-6782",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6782"
},
{
"name": "CVE-2026-6786",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6786"
},
{
"name": "CVE-2026-6750",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6750"
},
{
"name": "CVE-2026-6757",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6757"
},
{
"name": "CVE-2026-6768",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6768"
},
{
"name": "CVE-2026-6746",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6746"
},
{
"name": "CVE-2026-6761",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6761"
},
{
"name": "CVE-2026-6762",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6762"
},
{
"name": "CVE-2026-6769",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6769"
},
{
"name": "CVE-2026-6751",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6751"
},
{
"name": "CVE-2026-6780",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6780"
},
{
"name": "CVE-2026-6765",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6765"
},
{
"name": "CVE-2026-2781",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-2781"
},
{
"name": "CVE-2026-6773",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6773"
},
{
"name": "CVE-2026-6754",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6754"
},
{
"name": "CVE-2026-6781",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6781"
},
{
"name": "CVE-2026-6756",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6756"
},
{
"name": "CVE-2026-6758",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6758"
},
{
"name": "CVE-2026-6785",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6785"
},
{
"name": "CVE-2026-6783",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6783"
},
{
"name": "CVE-2026-6760",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6760"
},
{
"name": "CVE-2026-6759",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6759"
},
{
"name": "CVE-2026-6774",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6774"
},
{
"name": "CVE-2026-6779",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6779"
},
{
"name": "CVE-2026-6777",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6777"
},
{
"name": "CVE-2026-6748",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6748"
},
{
"name": "CVE-2026-6778",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6778"
},
{
"name": "CVE-2026-6752",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6752"
},
{
"name": "CVE-2026-6767",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6767"
},
{
"name": "CVE-2026-6775",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6775"
},
{
"name": "CVE-2026-6749",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6749"
},
{
"name": "CVE-2026-6771",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6771"
},
{
"name": "CVE-2026-6753",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6753"
},
{
"name": "CVE-2026-6764",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6764"
},
{
"name": "CVE-2026-6763",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6763"
},
{
"name": "CVE-2026-6776",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6776"
},
{
"name": "CVE-2026-6766",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6766"
},
{
"name": "CVE-2026-6770",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6770"
},
{
"name": "CVE-2026-6784",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6784"
},
{
"name": "CVE-2026-6755",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-6755"
}
],
"initial_release_date": "2026-04-22T00:00:00",
"last_revision_date": "2026-04-22T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0480",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-04-22T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Ex\u00e9cution de code arbitraire \u00e0 distance"
},
{
"description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
},
{
"description": "Contournement de la politique de s\u00e9curit\u00e9"
},
{
"description": "Atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es"
},
{
"description": "\u00c9l\u00e9vation de privil\u00e8ges"
}
],
"summary": "De multiples vuln\u00e9rabilit\u00e9s ont \u00e9t\u00e9 d\u00e9couvertes dans les produits Mozilla. Certaines d\u0027entre elles permettent \u00e0 un attaquant de provoquer une ex\u00e9cution de code arbitraire \u00e0 distance, une \u00e9l\u00e9vation de privil\u00e8ges et un d\u00e9ni de service \u00e0 distance.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans les produits Mozilla",
"vendor_advisories": [
{
"published_at": "2026-04-21",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-32",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-32/"
},
{
"published_at": "2026-04-21",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-34",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-34/"
},
{
"published_at": "2026-04-21",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-33",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-33/"
},
{
"published_at": "2026-04-21",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-31",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-31/"
},
{
"published_at": "2026-04-21",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-30",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-30/"
}
]
}
CVE-2026-6755 (GCVE-0-2026-6755)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-27 16:54
VLAI
EPSS
VEX
Title
Mitigation bypass in the DOM: postMessage component
Summary
Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-21 13:47 UTC
CWE
- CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
150 , ≤ *
(rpm)
|
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-6755",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-21T13:47:14.506850Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-352",
"description": "CWE-352 Cross-Site Request Forgery (CSRF)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-27T16:54:24.193Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "paranoidmoth"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150 and Thunderbird 150."
}
],
"value": "Mitigation bypass in the DOM: postMessage component. This vulnerability was fixed in Firefox 150 and Thunderbird 150."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-21T23:34:47.512Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1880429"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-33/"
}
],
"title": "Mitigation bypass in the DOM: postMessage component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-6755",
"datePublished": "2026-04-21T12:40:51.382Z",
"dateReserved": "2026-04-21T12:40:51.062Z",
"dateUpdated": "2026-05-27T16:54:24.193Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-6756 (GCVE-0-2026-6756)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-26 18:26
VLAI
EPSS
VEX
Title
Mitigation bypass in Firefox for Android
Summary
Mitigation bypass in Firefox for Android. This vulnerability was fixed in Firefox 150.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 14:29 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-6756",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-22T14:29:47.387240Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-200",
"description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T18:26:47.521Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Hafiizh \u0026 Kang Ali"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Mitigation bypass in Firefox for Android. This vulnerability was fixed in Firefox 150."
}
],
"value": "Mitigation bypass in Firefox for Android. This vulnerability was fixed in Firefox 150."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-21T12:40:52.082Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1992585"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"
}
],
"title": "Mitigation bypass in Firefox for Android"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-6756",
"datePublished": "2026-04-21T12:40:52.082Z",
"dateReserved": "2026-04-21T12:40:51.756Z",
"dateUpdated": "2026-05-26T18:26:47.521Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-6757 (GCVE-0-2026-6757)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-26 18:07
VLAI
EPSS
VEX
Title
Invalid pointer in the JavaScript: WebAssembly component
Summary
Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 14:30 UTC
CWE
- CWE-824 - Access of Uninitialized Pointer
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 6.3,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-6757",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-22T14:30:51.577650Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-824",
"description": "CWE-824 Access of Uninitialized Pointer",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T18:07:08.301Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Evyatar Ben Asher, Keane Lucas, Nicholas Carlini, Newton Cheng, Daniel Freeman, Alex Gaynor, and Joel Weinberger using Claude from Anthropic"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
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CVE-2026-6758 (GCVE-0-2026-6758)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-26 18:51
VLAI
EPSS
VEX
Title
Use-after-free in the JavaScript: WebAssembly component
Summary
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 15:06 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
150 , ≤ *
(rpm)
|
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CVE-2026-6759 (GCVE-0-2026-6759)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-26 18:29
VLAI
EPSS
VEX
Title
Use-after-free in the Widget: Cocoa component
Summary
Use-after-free in the Widget: Cocoa component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 15:06 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
Credits
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CVE-2026-6760 (GCVE-0-2026-6760)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-26 17:49
VLAI
EPSS
VEX
Title
Mitigation bypass in the Networking: Cookies component
Summary
Mitigation bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 150 and Thunderbird 150.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 14:31 UTC
CWE
- CWE-288 - Authentication Bypass Using an Alternate Path or Channel
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
150 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
150 , ≤ *
(rpm)
|
Credits
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CVE-2026-6761 (GCVE-0-2026-6761)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-27 17:06
VLAI
EPSS
VEX
Title
Privilege escalation in the Networking component
Summary
Privilege escalation in the Networking component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-23 03:56 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
Credits
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CVE-2026-6762 (GCVE-0-2026-6762)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-26 18:40
VLAI
EPSS
VEX
Title
Spoofing issue in the DOM: Core & HTML component
Summary
Spoofing issue in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity
6.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-22 14:32 UTC
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.35 , ≤ 115.*
(rpm)
Unaffected: 140.10 , ≤ 140.* (rpm) Unaffected: 150 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
Credits
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},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "115.*",
"status": "unaffected",
"version": "115.35",
"versionType": "rpm"
},
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Farras Givari"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Spoofing issue in the DOM: Core \u0026 HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."
}
],
"value": "Spoofing issue in the DOM: Core \u0026 HTML component. This vulnerability was fixed in Firefox 150, Firefox ESR 115.35, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."
}
],
"providerMetadata": {
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"references": [
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{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-31/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-32/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-33/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-34/"
}
],
"title": "Spoofing issue in the DOM: Core \u0026 HTML component"
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"datePublished": "2026-04-21T12:40:56.838Z",
"dateReserved": "2026-04-21T12:40:56.529Z",
"dateUpdated": "2026-05-26T18:40:29.784Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2"
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CVE-2026-6763 (GCVE-0-2026-6763)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-26 17:51
VLAI
EPSS
VEX
Title
Mitigation bypass in the File Handling component
Summary
Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-21 20:12 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "LOW",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N",
"version": "3.1"
}
},
{
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"options": [
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-04-21T20:12:14.804188Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
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"cweId": "CWE-693",
"description": "CWE-693 Protection Mechanism Failure",
"lang": "en",
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}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-26T17:51:53.896Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Tomoya Nakanishi"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."
}
],
"value": "Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-21T23:34:56.036Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2021666"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-32/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-33/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-34/"
}
],
"title": "Mitigation bypass in the File Handling component"
}
},
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},
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}
CVE-2026-6764 (GCVE-0-2026-6764)
Vulnerability from cvelistv5 – Published: 2026-04-21 12:40 – Updated: 2026-05-27 17:00
VLAI
EPSS
VEX
Title
Incorrect boundary conditions in the DOM: Device Interfaces component
Summary
Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-27 17:00 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.10 , ≤ 140.*
(rpm)
Unaffected: 150 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "LOW",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L",
"version": "3.1"
}
},
{
"other": {
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"options": [
{
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},
{
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-27T17:00:30.431335Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-119",
"description": "CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-27T17:00:36.069Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.10",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "150",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Florian"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."
}
],
"value": "Incorrect boundary conditions in the DOM: Device Interfaces component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10."
}
],
"providerMetadata": {
"dateUpdated": "2026-04-21T23:34:57.148Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
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"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2022162"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-30/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-32/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-33/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-34/"
}
],
"title": "Incorrect boundary conditions in the DOM: Device Interfaces component"
}
},
"cveMetadata": {
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"datePublished": "2026-04-21T12:40:58.297Z",
"dateReserved": "2026-04-21T12:40:57.986Z",
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}
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Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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