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CERTFR-2026-AVI-1106
Vulnerability from certfr_avis - Published: 2026-09-02 - Updated: 2026-09-02
De multiples vulnérabilités ont été découvertes dans les produits Mozilla. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, une atteinte à la confidentialité des données et un contournement de la politique de sécurité.
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 115.40 | ||
| Mozilla | Firefox | Firefox versions antérieures à 155 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 153.2 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 140.15 | ||
| Mozilla | Thunderbird ESR | Thunderbird ESR versions antérieures à 153.2 | ||
| Mozilla | Thunderbird ESR | Thunderbird ESR versions antérieures à 140.15 | ||
| Mozilla | Thunderbird | Thunderbird versions antérieures à 155 |
References
| Title | Publication Time | Tags | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 115.40",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox versions ant\u00e9rieures \u00e0 155",
"product": {
"name": "Firefox",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 153.2",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 140.15",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird ESR versions ant\u00e9rieures \u00e0 153.2",
"product": {
"name": "Thunderbird ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird ESR versions ant\u00e9rieures \u00e0 140.15",
"product": {
"name": "Thunderbird ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird versions ant\u00e9rieures \u00e0 155",
"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-2026-84137",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84137"
},
{
"name": "CVE-2026-84637",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84637"
},
{
"name": "CVE-2026-84640",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84640"
},
{
"name": "CVE-2026-84138",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84138"
},
{
"name": "CVE-2026-84126",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84126"
},
{
"name": "CVE-2026-84135",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84135"
},
{
"name": "CVE-2026-84117",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84117"
},
{
"name": "CVE-2026-84140",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84140"
},
{
"name": "CVE-2026-84134",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84134"
},
{
"name": "CVE-2026-84122",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84122"
},
{
"name": "CVE-2026-84642",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84642"
},
{
"name": "CVE-2026-84121",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84121"
},
{
"name": "CVE-2026-84123",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84123"
},
{
"name": "CVE-2026-16365",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-16365"
},
{
"name": "CVE-2026-16371",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-16371"
},
{
"name": "CVE-2026-84144",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84144"
},
{
"name": "CVE-2026-84641",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84641"
},
{
"name": "CVE-2026-84119",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84119"
},
{
"name": "CVE-2026-84639",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84639"
},
{
"name": "CVE-2026-84132",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84132"
},
{
"name": "CVE-2026-74952",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74952"
},
{
"name": "CVE-2026-84124",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84124"
},
{
"name": "CVE-2026-84145",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84145"
},
{
"name": "CVE-2026-84136",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84136"
},
{
"name": "CVE-2026-84131",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84131"
},
{
"name": "CVE-2026-75874",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-75874"
},
{
"name": "CVE-2026-84133",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84133"
},
{
"name": "CVE-2026-84129",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84129"
},
{
"name": "CVE-2026-84127",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84127"
},
{
"name": "CVE-2026-84141",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84141"
},
{
"name": "CVE-2026-84125",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84125"
},
{
"name": "CVE-2026-84120",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84120"
},
{
"name": "CVE-2026-84139",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84139"
},
{
"name": "CVE-2026-84142",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84142"
},
{
"name": "CVE-2026-84118",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84118"
},
{
"name": "CVE-2026-84143",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84143"
},
{
"name": "CVE-2026-84130",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84130"
},
{
"name": "CVE-2026-84128",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-84128"
}
],
"initial_release_date": "2026-09-02T00:00:00",
"last_revision_date": "2026-09-02T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1106",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-09-02T00:00:00.000000"
}
],
"risks": [
{
"description": "Non sp\u00e9cifi\u00e9 par l\u0027\u00e9diteur"
},
{
"description": "D\u00e9ni de service"
},
{
"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 \u00e9l\u00e9vation de privil\u00e8ges, une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es et un contournement de la politique de s\u00e9curit\u00e9.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans les produits Mozilla",
"vendor_advisories": [
{
"published_at": "2026-09-01",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-83",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-83/"
},
{
"published_at": "2026-09-01",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-87",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-87/"
},
{
"published_at": "2026-09-01",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-85",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-85/"
},
{
"published_at": "2026-09-01",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-84",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-84/"
},
{
"published_at": "2026-09-01",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-88",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-88/"
},
{
"published_at": "2026-09-01",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-82",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-82/"
},
{
"published_at": "2026-09-01",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-86",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-86/"
}
]
}
CVE-2026-84123 (GCVE-0-2026-84123)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-02 03:55
VLAI
EPSS
VEX
Title
Privilege escalation due to use-after-free in the Graphics: WebGPU component
Summary
Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 00:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (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-2026-84123",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-02T03:55:41.775Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Yaqoub Aldurayhim"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2."
}
],
"value": "Privilege escalation due to use-after-free in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T21:44:10.638Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2060047"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-82/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-85/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-86/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-88/"
}
],
"title": "Privilege escalation due to use-after-free in the Graphics: WebGPU component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-84123",
"datePublished": "2026-09-01T12:18:50.681Z",
"dateReserved": "2026-09-01T07:25:15.751Z",
"dateUpdated": "2026-09-02T03:55:41.775Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-84124 (GCVE-0-2026-84124)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-01 21:44
VLAI
EPSS
VEX
Title
Use-after-free in the DOM: Core & HTML component
Summary
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 15:00 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.15 , ≤ 140.*
(rpm)
Unaffected: 153.2 , ≤ 153.* (rpm) Unaffected: 155 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.15 , ≤ 140.*
(rpm)
Unaffected: 153.2 , ≤ 153.* (rpm) Unaffected: 155 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 5.4,
"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:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-84124",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T15:00:58.071574Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-416",
"description": "CWE-416 Use After Free",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T15:01:02.218Z",
"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": "140.15",
"versionType": "rpm"
},
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.15",
"versionType": "rpm"
},
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Hyeonjun Ahn"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Use-after-free in the DOM: Core \u0026 HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2."
}
],
"value": "Use-after-free in the DOM: Core \u0026 HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T21:44:10.896Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2061110"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-82/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-84/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-85/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-86/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-87/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-88/"
}
],
"title": "Use-after-free in the DOM: Core \u0026 HTML component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-84124",
"datePublished": "2026-09-01T12:18:51.705Z",
"dateReserved": "2026-09-01T07:25:18.000Z",
"dateUpdated": "2026-09-01T21:44:10.896Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-84125 (GCVE-0-2026-84125)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-01 21:44
VLAI
EPSS
VEX
Title
Use-after-free in the DOM: Core & HTML component
Summary
Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:15 UTC
CWE
- CWE-416 - Use After Free
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
Credits
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CVE-2026-84126 (GCVE-0-2026-84126)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-01 21:32
VLAI
EPSS
VEX
Title
Incorrect boundary conditions in the Layout: Grid component
Summary
Incorrect boundary conditions in the Layout: Grid component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 15:00 UTC
CWE
- CWE-120 - Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
155 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
155 , ≤ *
(rpm)
|
Credits
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CVE-2026-84127 (GCVE-0-2026-84127)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-01 14:59
VLAI
EPSS
VEX
Title
Information disclosure in the WebExtensions component in Firefox for Android
Summary
Information disclosure in the WebExtensions component in Firefox for Android. This vulnerability was fixed in Firefox 155.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 14:59 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Credits
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CVE-2026-84128 (GCVE-0-2026-84128)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-02 03:55
VLAI
EPSS
VEX
Title
Privilege escalation in the WebDriver BiDi component
Summary
Privilege escalation in the WebDriver BiDi component. This vulnerability was fixed in Firefox 155 and Thunderbird 155.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 00:00 UTC
CWE
- CWE-284 - Improper Access Control
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
155 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
155 , ≤ *
(rpm)
|
Credits
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CVE-2026-84129 (GCVE-0-2026-84129)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-02 15:49
VLAI
EPSS
VEX
Title
Site isolation issue in the DOM: Navigation component
Summary
Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-02 15:47 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
Credits
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CVE-2026-84130 (GCVE-0-2026-84130)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-03 17:24
VLAI
EPSS
VEX
Title
Information disclosure in the Graphics: WebGPU component
Summary
Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 15:42 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-84130",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-03T15:42:55.306987Z",
"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": "2026-09-03T17:24:42.674Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "5up3rh3i"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2."
}
],
"value": "Information disclosure in the Graphics: WebGPU component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T21:44:11.731Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2057834"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-82/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-85/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-86/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-88/"
}
],
"title": "Information disclosure in the Graphics: WebGPU component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-84130",
"datePublished": "2026-09-01T12:18:57.806Z",
"dateReserved": "2026-09-01T07:25:31.624Z",
"dateUpdated": "2026-09-03T17:24:42.674Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-84131 (GCVE-0-2026-84131)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-02 03:55
VLAI
EPSS
VEX
Title
Privilege escalation due to invalid pointer in the Graphics component
Summary
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 00:00 UTC
CWE
- CWE-763 - Release of Invalid Pointer or Reference
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.40 , ≤ 115.*
(rpm)
Unaffected: 140.15 , ≤ 140.* (rpm) Unaffected: 153.2 , ≤ 153.* (rpm) Unaffected: 155 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.15 , ≤ 140.*
(rpm)
Unaffected: 153.2 , ≤ 153.* (rpm) Unaffected: 155 , ≤ * (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-2026-84131",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-01T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-763",
"description": "CWE-763 Release of Invalid Pointer or Reference",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-02T03:55:25.128Z",
"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": "115.40",
"versionType": "rpm"
},
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.15",
"versionType": "rpm"
},
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "140.*",
"status": "unaffected",
"version": "140.15",
"versionType": "rpm"
},
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "navapon"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2."
}
],
"value": "Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T21:44:08.906Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2060008"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-82/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-83/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-84/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-85/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-86/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-87/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-88/"
}
],
"title": "Privilege escalation due to invalid pointer in the Graphics component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-84131",
"datePublished": "2026-09-01T12:18:42.768Z",
"dateReserved": "2026-09-01T07:25:34.092Z",
"dateUpdated": "2026-09-02T03:55:25.128Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-84132 (GCVE-0-2026-84132)
Vulnerability from cvelistv5 – Published: 2026-09-01 12:18 – Updated: 2026-09-03 17:24
VLAI
EPSS
VEX
Title
Information disclosure in the Networking: HTTP component
Summary
Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 16:12 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.2 , ≤ 153.*
(rpm)
Unaffected: 155 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "NONE",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
"version": "3.1"
}
},
{
"other": {
"content": {
"id": "CVE-2026-84132",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-09-03T16:12:15.627205Z",
"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": "2026-09-03T17:24:37.242Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.2",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "155",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Shu Takahashi"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2."
}
],
"value": "Information disclosure in the Networking: HTTP component. This vulnerability was fixed in Firefox 155, Firefox ESR 153.2, Thunderbird 155, and Thunderbird 153.2."
}
],
"providerMetadata": {
"dateUpdated": "2026-09-01T21:44:12.025Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2063020"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-82/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-85/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-86/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-88/"
}
],
"title": "Information disclosure in the Networking: HTTP component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-84132",
"datePublished": "2026-09-01T12:18:58.805Z",
"dateReserved": "2026-09-01T07:25:37.771Z",
"dateUpdated": "2026-09-03T17:24:37.242Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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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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