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CERTFR-2026-AVI-1054
Vulnerability from certfr_avis - Published: 2026-08-19 - Updated: 2026-08-19
De multiples vulnérabilités ont été découvertes dans les produits Mozilla. Certaines d'entre elles permettent à un attaquant de provoquer une élévation de privilèges, un déni de service à distance et une atteinte à la confidentialité des données.
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 154 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 115.39 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 153.1 | ||
| Mozilla | Thunderbird ESR | Thunderbird ESR versions antérieures à 140.14 | ||
| Mozilla | Firefox ESR | Firefox ESR versions antérieures à 140.14 | ||
| Mozilla | Thunderbird ESR | Thunderbird ESR versions antérieures à 153.1 | ||
| Mozilla | Firefox | Firefox versions antérieures à 154 |
References
| Title | Publication Time | Tags | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
|||||||||||||||||||||||
{
"$ref": "https://www.cert.ssi.gouv.fr/openapi.json",
"affected_systems": [
{
"description": "Thunderbird versions ant\u00e9rieures \u00e0 154",
"product": {
"name": "Thunderbird",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 115.39",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 153.1",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird ESR versions ant\u00e9rieures \u00e0 140.14",
"product": {
"name": "Thunderbird ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox ESR versions ant\u00e9rieures \u00e0 140.14",
"product": {
"name": "Firefox ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Thunderbird ESR versions ant\u00e9rieures \u00e0 153.1",
"product": {
"name": "Thunderbird ESR",
"vendor": {
"name": "Mozilla",
"scada": false
}
}
},
{
"description": "Firefox versions ant\u00e9rieures \u00e0 154",
"product": {
"name": "Firefox",
"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-2026-74973",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74973"
},
{
"name": "CVE-2026-74966",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74966"
},
{
"name": "CVE-2026-74944",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74944"
},
{
"name": "CVE-2026-74936",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74936"
},
{
"name": "CVE-2026-74989",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74989"
},
{
"name": "CVE-2026-74948",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74948"
},
{
"name": "CVE-2026-74963",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74963"
},
{
"name": "CVE-2026-74975",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74975"
},
{
"name": "CVE-2026-74946",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74946"
},
{
"name": "CVE-2026-74947",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74947"
},
{
"name": "CVE-2026-74951",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74951"
},
{
"name": "CVE-2026-74974",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74974"
},
{
"name": "CVE-2026-74937",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74937"
},
{
"name": "CVE-2026-74967",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74967"
},
{
"name": "CVE-2026-74978",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74978"
},
{
"name": "CVE-2026-74955",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74955"
},
{
"name": "CVE-2026-74990",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74990"
},
{
"name": "CVE-2026-74972",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74972"
},
{
"name": "CVE-2026-74980",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74980"
},
{
"name": "CVE-2026-74956",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74956"
},
{
"name": "CVE-2026-74958",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74958"
},
{
"name": "CVE-2026-74969",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74969"
},
{
"name": "CVE-2026-74953",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74953"
},
{
"name": "CVE-2026-74945",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74945"
},
{
"name": "CVE-2026-74950",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74950"
},
{
"name": "CVE-2026-74968",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74968"
},
{
"name": "CVE-2026-74965",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74965"
},
{
"name": "CVE-2026-74986",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74986"
},
{
"name": "CVE-2026-74970",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74970"
},
{
"name": "CVE-2026-74959",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74959"
},
{
"name": "CVE-2026-74949",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74949"
},
{
"name": "CVE-2026-74940",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74940"
},
{
"name": "CVE-2026-74984",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74984"
},
{
"name": "CVE-2026-74943",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74943"
},
{
"name": "CVE-2026-74979",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74979"
},
{
"name": "CVE-2026-74988",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74988"
},
{
"name": "CVE-2026-74954",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74954"
},
{
"name": "CVE-2026-74960",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74960"
},
{
"name": "CVE-2026-74964",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74964"
},
{
"name": "CVE-2026-74957",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74957"
},
{
"name": "CVE-2026-74985",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74985"
},
{
"name": "CVE-2026-74939",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74939"
},
{
"name": "CVE-2026-74952",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74952"
},
{
"name": "CVE-2026-74961",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74961"
},
{
"name": "CVE-2026-74971",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74971"
},
{
"name": "CVE-2026-74941",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74941"
},
{
"name": "CVE-2026-74976",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74976"
},
{
"name": "CVE-2026-74935",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74935"
},
{
"name": "CVE-2026-74987",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74987"
},
{
"name": "CVE-2026-75874",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-75874"
},
{
"name": "CVE-2026-74982",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74982"
},
{
"name": "CVE-2026-74981",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74981"
},
{
"name": "CVE-2026-74977",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74977"
},
{
"name": "CVE-2026-74934",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74934"
},
{
"name": "CVE-2026-74938",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74938"
},
{
"name": "CVE-2026-74962",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74962"
},
{
"name": "CVE-2026-74942",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74942"
},
{
"name": "CVE-2026-74983",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-74983"
}
],
"initial_release_date": "2026-08-19T00:00:00",
"last_revision_date": "2026-08-19T00:00:00",
"links": [],
"reference": "CERTFR-2026-AVI-1054",
"revisions": [
{
"description": "Version initiale",
"revision_date": "2026-08-19T00:00:00.000000"
}
],
"risks": [
{
"description": "D\u00e9ni de service \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 \u00e9l\u00e9vation de privil\u00e8ges, un d\u00e9ni de service \u00e0 distance et une atteinte \u00e0 la confidentialit\u00e9 des donn\u00e9es.",
"title": "Multiples vuln\u00e9rabilit\u00e9s dans les produits Mozilla",
"vendor_advisories": [
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-80",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-80/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-75",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-75/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-74",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-74/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-76",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-76/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-77",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-77/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-79",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-79/"
},
{
"published_at": "2026-08-18",
"title": "Bulletin de s\u00e9curit\u00e9 Mozilla mfsa2026-78",
"url": "https://www.mozilla.org/en-US/security/advisories/mfsa2026-78/"
}
]
}
CVE-2026-74954 (GCVE-0-2026-74954)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:11
VLAI
EPSS
VEX
Title
Information disclosure due to side-channel in the Storage: Cache API component
Summary
Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:11 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (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-2026-74954",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "yes"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-18T19:11:33.369559Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-203",
"description": "CWE-203 Observable Discrepancy",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T19:11:42.423Z",
"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": "153.1",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
}
],
"credits": [
{
"lang": "en",
"value": "Tomoya Nakanishi"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1."
}
],
"value": "Information disclosure due to side-channel in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-18T18:55:32.071Z",
"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"shortName": "mozilla"
},
"references": [
{
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2025732"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-74/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-77/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-78/"
},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-80/"
}
],
"title": "Information disclosure due to side-channel in the Storage: Cache API component"
}
},
"cveMetadata": {
"assignerOrgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
"assignerShortName": "mozilla",
"cveId": "CVE-2026-74954",
"datePublished": "2026-08-18T12:23:37.219Z",
"dateReserved": "2026-08-17T11:58:08.011Z",
"dateUpdated": "2026-08-18T19:11:42.423Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
CVE-2026-74955 (GCVE-0-2026-74955)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55
VLAI
EPSS
VEX
Title
Privilege escalation in the Request Handling component
Summary
Privilege escalation in the Request Handling component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
8.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 00:00 UTC
CWE
- CWE-269 - Improper Privilege Management
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (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-2026-74955",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "total"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-20T00:00:00+00:00",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-269",
"description": "CWE-269 Improper Privilege Management",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T03:55:24.402Z",
"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": "153.1",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
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CVE-2026-74956 (GCVE-0-2026-74956)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:07
VLAI
EPSS
VEX
Title
Same-origin policy bypass in the DOM: Service Workers component
Summary
Same-origin policy bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:07 UTC
CWE
- CWE-843 - Access of Resource Using Incompatible Type ('Type Confusion')
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
Credits
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CVE-2026-74957 (GCVE-0-2026-74957)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:05
VLAI
EPSS
VEX
Title
Mitigation bypass in the Safe Browsing component
Summary
Mitigation bypass in the Safe Browsing component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 20:04 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
Credits
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CVE-2026-74958 (GCVE-0-2026-74958)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:03
VLAI
EPSS
VEX
Title
Information disclosure in the WebRTC component
Summary
Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:03 UTC
CWE
- CWE-1021 - Improper Restriction of Rendered UI Layers or Frames
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
Credits
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CVE-2026-74959 (GCVE-0-2026-74959)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:02
VLAI
EPSS
VEX
Title
Mitigation bypass in the Storage: Cache API component
Summary
Mitigation bypass in the Storage: Cache API component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 20:02 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
Credits
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CVE-2026-74960 (GCVE-0-2026-74960)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 20:00
VLAI
EPSS
VEX
Title
Site isolation issue in the WebExtensions component
Summary
Site isolation issue in the WebExtensions component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-21 19:59 UTC
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
Credits
{
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},
{
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"description": "CWE-284 Improper Access Control",
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}
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
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"title": "CISA ADP Vulnrichment"
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"vendor": "Mozilla",
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"status": "unaffected",
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"versionType": "rpm"
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}
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}
],
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},
{
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},
{
"url": "https://www.mozilla.org/security/advisories/mfsa2026-76/"
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CVE-2026-74961 (GCVE-0-2026-74961)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:22
VLAI
EPSS
VEX
Title
Side-channel in the Web Audio component
Summary
Side-channel in the Web Audio component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
9.1 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:28 UTC
CWE
- CWE-203 - Observable Discrepancy
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
Credits
{
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"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
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"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
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"version": "3.1"
}
},
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},
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},
{
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}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-20T15:28:18.379802Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
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{
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"description": "CWE-203 Observable Discrepancy",
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"type": "CWE"
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]
}
],
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"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
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{
"product": "Firefox",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "154",
"versionType": "rpm"
}
]
},
{
"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
"lessThanOrEqual": "153.*",
"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
{
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"status": "unaffected",
"version": "154",
"versionType": "rpm"
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]
}
],
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{
"lang": "en",
"value": "Rintaro Kawasugi"
}
],
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{
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"type": "text/html",
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}
],
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},
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},
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CVE-2026-74962 (GCVE-0-2026-74962)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-19 12:52
VLAI
EPSS
VEX
Title
Site isolation issue in the Networking: Cookies component
Summary
Site isolation issue in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
8.1 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 12:52 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
Credits
{
"containers": {
"adp": [
{
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{
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"attackComplexity": "LOW",
"attackVector": "NETWORK",
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},
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],
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"timestamp": "2026-08-19T12:52:53.097807Z",
"version": "2.0.3"
},
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"product": "Firefox",
"vendor": "Mozilla",
"versions": [
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"status": "unaffected",
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"vendor": "Mozilla",
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"versionType": "rpm"
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}
],
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{
"lang": "en",
"value": "Yaqoub Aldurayhim"
}
],
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"base64": false,
"type": "text/html",
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}
],
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],
"providerMetadata": {
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},
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CVE-2026-74963 (GCVE-0-2026-74963)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:23
VLAI
EPSS
VEX
Title
Same-origin policy bypass in the Networking: Cookies component
Summary
Same-origin policy bypass in the Networking: Cookies component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:23 UTC
CWE
- CWE-346 - Origin Validation Error
Assigner
References
7 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
140.14 , ≤ 140.*
(rpm)
Unaffected: 153.1 , ≤ 153.* (rpm) Unaffected: 154 , ≤ * (rpm) |
Credits
{
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{
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},
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}
],
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"timestamp": "2026-08-18T19:23:41.234521Z",
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},
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],
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Loading…
Trend slope:
-
(linear fit over daily sighting counts)
Show additional events:
Loading…
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.
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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.
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.
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