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6603 vulnerabilities found for Firefox by Mozilla
CERTFR-2026-AVI-0615
Vulnerability from certfr_avis - Published: 2026-05-20 - Updated: 2026-05-20
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, 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 | Thunderbird | Thunderbird versions antérieures à 151 | ||
| Mozilla | Firefox | Firefox versions antérieures à 151 | ||
| Mozilla | Firefox | Firefox pour iOS versions antérieures à 151.0 | ||
| Mozilla | Thunderbird | Thunderbird versions antérieures à 140.11 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 115.36 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 140.11 |
References
| Title | Publication Time | Tags | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Thunderbird versions ant\u00e9rieures \u00e0 151",
"product": {
"name": "Thunderbird",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox versions ant\u00e9rieures \u00e0 151",
"product": {
"name": "Firefox",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox pour iOS versions ant\u00e9rieures \u00e0 151.0",
"product": {
"name": "Firefox",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird versions ant\u00e9rieures \u00e0 140.11",
"product": {
"name": "Thunderbird",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 115.36",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 140.11",
"product": {
"name": "Firefox ESR",
"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-2026-8975",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8975"
},
{
"name": "CVE-2026-8961",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8961"
},
{
"name": "CVE-2026-8946",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8946"
},
{
"name": "CVE-2026-8948",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8948"
},
{
"name": "CVE-2026-8945",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8945"
},
{
"name": "CVE-2026-8958",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8958"
},
{
"name": "CVE-2026-8974",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8974"
},
{
"name": "CVE-2026-8964",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8964"
},
{
"name": "CVE-2026-8973",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8973"
},
{
"name": "CVE-2026-8954",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8954"
},
{
"name": "CVE-2026-8957",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8957"
},
{
"name": "CVE-2026-8951",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8951"
},
{
"name": "CVE-2026-8952",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8952"
},
{
"name": "CVE-2026-8706",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8706"
},
{
"name": "CVE-2026-8956",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8956"
},
{
"name": "CVE-2026-8967",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8967"
},
{
"name": "CVE-2026-8971",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8971"
},
{
"name": "CVE-2026-8953",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8953"
},
{
"name": "CVE-2026-8970",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8970"
},
{
"name": "CVE-2026-8965",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8965"
},
{
"name": "CVE-2026-8949",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8949"
},
{
"name": "CVE-2026-8972",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8972"
},
{
"name": "CVE-2026-8969",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8969"
},
{
"name": "CVE-2026-8401",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8401"
},
{
"name": "CVE-2026-8391",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8391"
},
{
"name": "CVE-2026-8962",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8962"
},
{
"name": "CVE-2026-8963",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8963"
},
{
"name": "CVE-2026-8388",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8388"
},
{
"name": "CVE-2026-8968",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8968"
},
{
"name": "CVE-2026-8966",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8966"
},
{
"name": "CVE-2026-8960",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8960"
},
{
"name": "CVE-2026-8950",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8950"
},
{
"name": "CVE-2026-8959",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8959"
},
{
"name": "CVE-2026-8947",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8947"
},
{
"name": "CVE-2026-8955",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-8955"
}
],
"initial_release_date": "2026-05-20T00:00:00",
"last_revision_date": "2026-05-20T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-0615",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-05-20T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \u00e0 distance"
},
{
"description": "Ex\u00e9cution de code arbitraire"
},
{
"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, 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": "2026-05-19",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-47",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-47/"
},
{
"published_at": "2026-05-19",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-46",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-46/"
},
{
"published_at": "2026-05-19",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-50",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-50/"
},
{
"published_at": "2026-05-19",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-48",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-48/"
},
{
"published_at": "2026-05-19",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-49",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-49/"
},
{
"published_at": "2026-05-19",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-51",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-51/"
}
]
}
CVE-2026-8706 (GCVE-0-2026-8706)
Vulnerability from nvd – Published: 2026-05-19 14:27 – Updated: 2026-05-19 17:12
VLAI
Title
Sensitive user data could be leaked to other applications through Reader mode
Summary
Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.
Severity
6.5 (Medium)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox for iOS |
Unaffected:
151.0 , ≤ *
(rpm)
|
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "ADJACENT_NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.5,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-8706",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-19T15:57:56.872624Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-306",
"description": "CWE-306 Missing Authentication for Critical Function",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-200",
"description": "CWE-200 Exposure of Sensitive Information to an Unauthorized Actor",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-05-19T17:12:23.626Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox for iOS",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "151.0",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Muneaki Nishimura"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user\u0027s cookies. This vulnerability was fixed in Firefox for iOS 151.0."
}
],
"value": "Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user\u0027s cookies. This vulnerability was fixed in Firefox for iOS 151.0."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-19T14:27:38.483Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2036618"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-49/"
}
],
"title": "Sensitive user data could be leaked to other applications through Reader mode"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-8706",
"datePublished": "2026-05-19T14:27:38.483Z",
"dateReserved": "2026-05-15T19:32:40.967Z",
"dateUpdated": "2026-05-19T17:12:23.626Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8975 (GCVE-0-2026-8975)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:39
VLAI
Title
Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151
Summary
Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
8.8 (High)
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.36 , ≤ 115.*
(rpm)
Unaffected: 140.11 , ≤ 140.* (rpm) Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-8975",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-20T03:55:35.021555Z",
"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": "2026-05-20T15:39:49.342Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "115.*",
"status": "unaffected",
"version": "115.36",
"versionType": "rpm"
},
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.11",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "151",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.11",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "151",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Andrew McCreight, Valentin Gosu, Nika Layzell, Tom Schuster and the Mozilla Fuzzing Team"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11."
}
],
"value": "Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11."
}
],
"providerMetadata": {
"dateUpdated": "2026-05-19T17:10:52.485Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"name": "Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151",
"url": "https://bugzilla.mozilla.org/buglist.cgi?bug_id=1860195%2C2029325%2C2029429%2C2029910%2C2035915%2C2038678%2C2038669"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-46/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-47/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-48/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-50/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-51/"
}
],
"title": "Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-8975",
"datePublished": "2026-05-19T12:30:24.616Z",
"dateReserved": "2026-05-19T12:30:23.949Z",
"dateUpdated": "2026-05-20T15:39:49.342Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-8974 (GCVE-0-2026-8974)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:39
VLAI
Title
Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151
Summary
Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
8.8 (High)
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:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "REQUIRED",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-8974",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-05-20T03:55:33.858670Z",
"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": {
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CVE-2026-8973 (GCVE-0-2026-8973)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:39
VLAI
Title
Memory safety bugs fixed in Thunderbird 151
Summary
Memory safety bugs present in Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
8.8 (High)
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:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8972 (GCVE-0-2026-8972)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:38
VLAI
Title
Privilege escalation in the WebRTC: Audio/Video component
Summary
Privilege escalation in the WebRTC: Audio/Video component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8971 (GCVE-0-2026-8971)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-19 17:10
VLAI
Title
Same-origin policy bypass in the Networking: JAR component
Summary
Same-origin policy bypass in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
6.5 (Medium)
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8970 (GCVE-0-2026-8970)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:38
VLAI
Title
Privilege escalation in the Security component
Summary
Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8969 (GCVE-0-2026-8969)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-19 17:10
VLAI
Title
Mitigation bypass in the DOM: Security component
Summary
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
8.1 (High)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8968 (GCVE-0-2026-8968)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-19 17:10
VLAI
Title
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
Summary
Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
7.5 (High)
CWE
- CWE-400 - Uncontrolled Resource Consumption
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8967 (GCVE-0-2026-8967)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:46
VLAI
Title
Information disclosure in the Graphics: WebGPU component
Summary
Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
7.5 (High)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8966 (GCVE-0-2026-8966)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:46
VLAI
Title
Information disclosure in the IP Protection component
Summary
Information disclosure in the IP Protection component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
7.5 (High)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8965 (GCVE-0-2026-8965)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-20 15:46
VLAI
Title
Information disclosure in the DOM: Security component
Summary
Information disclosure in the DOM: Security component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
7.5 (High)
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8964 (GCVE-0-2026-8964)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-19 17:10
VLAI
Title
Spoofing issue in the Popup Blocker component
Summary
Spoofing issue in the Popup Blocker component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
7.5 (High)
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8963 (GCVE-0-2026-8963)
Vulnerability from nvd – Published: 2026-05-19 12:30 – Updated: 2026-05-19 17:10
VLAI
Title
Spoofing issue in the Web Speech component
Summary
Spoofing issue in the Web Speech component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
7.5 (High)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8962 (GCVE-0-2026-8962)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-20 15:46
VLAI
Title
Mitigation bypass in the DOM: Security component
Summary
Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
8.1 (High)
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8961 (GCVE-0-2026-8961)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-20 15:46
VLAI
Title
Spoofing issue in the Form Autofill component
Summary
Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
6.5 (Medium)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8960 (GCVE-0-2026-8960)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Spoofing issue in WebExtensions
Summary
Spoofing issue in WebExtensions. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
7.5 (High)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8959 (GCVE-0-2026-8959)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component
Summary
Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
9.6 (Critical)
CWE
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8958 (GCVE-0-2026-8958)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Information disclosure, sandbox escape in the Security: Process Sandboxing component
Summary
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
8.6 (High)
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8957 (GCVE-0-2026-8957)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-20 15:37
VLAI
Title
Privilege escalation in the Enterprise Policies component
Summary
Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8956 (GCVE-0-2026-8956)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Integer overflow in the Networking: JAR component
Summary
Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
9.8 (Critical)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8955 (GCVE-0-2026-8955)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-20 15:37
VLAI
Title
Privilege escalation in the DOM: Workers component
Summary
Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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"scope": "UNCHANGED",
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CVE-2026-8954 (GCVE-0-2026-8954)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Incorrect boundary conditions, integer overflow in the Audio/Video component
Summary
Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
7.5 (High)
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:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8953 (GCVE-0-2026-8953)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Sandbox escape due to use-after-free in the Disability Access APIs component
Summary
Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
9.6 (Critical)
CWE
- CWE-416 - Use After Free
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.36 , ≤ 115.*
(rpm)
Unaffected: 140.11 , ≤ 140.* (rpm) Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8952 (GCVE-0-2026-8952)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-20 15:37
VLAI
Title
Privilege escalation in the Application Update component
Summary
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
Severity
8.8 (High)
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
151 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
151 , ≤ *
(rpm)
|
Credits
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CVE-2026-8951 (GCVE-0-2026-8951)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 15:42
VLAI
Title
Spoofing issue in the Toolbar component in Firefox for Android
Summary
Spoofing issue in the Toolbar component in Firefox for Android. This vulnerability was fixed in Firefox 151.
Severity
6.5 (Medium)
CWE
- CWE-290 - Authentication Bypass by Spoofing
Assigner
References
Credits
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CVE-2026-8950 (GCVE-0-2026-8950)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Same-origin policy bypass in the Networking: HTTP component
Summary
Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
9.3 (Critical)
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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CVE-2026-8949 (GCVE-0-2026-8949)
Vulnerability from nvd – Published: 2026-05-19 12:29 – Updated: 2026-05-19 17:10
VLAI
Title
Integer overflow in the Widget: Win32 component
Summary
Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Severity
7.5 (High)
CWE
- CWE-190 - Integer Overflow or Wraparound
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.11 , ≤ 140.*
(rpm)
Unaffected: 151 , ≤ * (rpm) |
Credits
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},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-48/"
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CVE-2026-8706 (GCVE-0-2026-8706)
Vulnerability from cvelistv5 – Published: 2026-05-19 14:27 – Updated: 2026-05-19 17:12
VLAI
Title
Sensitive user data could be leaked to other applications through Reader mode
Summary
Firefox for iOS hosted Reader mode on an unauthenticated local web server, allowing another application on the same device to request arbitrary URLs and receive the response rendered with the signed-in user's cookies. This vulnerability was fixed in Firefox for iOS 151.0.
Severity
6.5 (Medium)
CWE
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox for iOS |
Unaffected:
151.0 , ≤ *
(rpm)
|
Credits
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"vendor": "Mozilla",
"versions": [
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"versionType": "rpm"
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"base64": false,
"type": "text/html",
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