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2684 vulnerabilities
CVE-2026-74989 (GCVE-0-2026-74989)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:20
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird 154
Summary
Internally found bugs present in Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154 and Thunderbird 154.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:50 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
154 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
154 , ≤ *
(rpm)
|
{
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CVE-2026-74988 (GCVE-0-2026-74988)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:20
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird ESR 153.1 and Thunderbird 154
Summary
Internally found bugs present in Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:49 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
7 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) |
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"title": "CISA ADP Vulnrichment"
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"vendor": "Mozilla",
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}
],
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},
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CVE-2026-74986 (GCVE-0-2026-74986)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:21
VLAI
EPSS
VEX
Title
Site isolation issue in the CSS Parsing and Computation component
Summary
Site isolation issue in the CSS Parsing and Computation 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: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:45 UTC
CWE
- CWE-200 - Exposure of Sensitive Information to an Unauthorized Actor
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
|
| Mozilla | Thunderbird |
Unaffected:
153.1 , ≤ 153.*
(rpm)
Unaffected: 154 , ≤ * (rpm) |
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CVE-2026-74985 (GCVE-0-2026-74985)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55
VLAI
EPSS
VEX
Title
Privilege escalation in the Enterprise Policies component
Summary
Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
9.8 (Critical)
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) |
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"metrics": [
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"attackVector": "NETWORK",
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"vendor": "Mozilla",
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"versionType": "rpm"
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"status": "unaffected",
"version": "154",
"versionType": "rpm"
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"product": "Thunderbird",
"vendor": "Mozilla",
"versions": [
{
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"status": "unaffected",
"version": "153.1",
"versionType": "rpm"
},
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"version": "154",
"versionType": "rpm"
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]
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"base64": false,
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}
],
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}
],
"providerMetadata": {
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"orgId": "f16b083a-5664-49f3-a51e-8d479e5ed7fe",
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"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": "Privilege escalation in the Enterprise Policies component"
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"datePublished": "2026-08-18T12:23:41.159Z",
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CVE-2026-74984 (GCVE-0-2026-74984)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:21
VLAI
EPSS
VEX
Title
Race condition in the JavaScript Engine component
Summary
Race condition in the JavaScript Engine component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
6.8 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:38 UTC
CWE
- CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
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) |
{
"containers": {
"adp": [
{
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "HIGH",
"attackVector": "NETWORK",
"availabilityImpact": "NONE",
"baseScore": 6.8,
"baseSeverity": "MEDIUM",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
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CVE-2026-74982 (GCVE-0-2026-74982)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:21
VLAI
EPSS
VEX
Title
Denial-of-service in the Widget component
Summary
Denial-of-service in the Widget 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 2026-08-20 15:36 UTC
CWE
- CWE-400 - Uncontrolled Resource Consumption
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) |
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CVE-2026-74981 (GCVE-0-2026-74981)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:21
VLAI
EPSS
VEX
Title
Site isolation issue in the Audio/Video: Web Codecs component
Summary
Site isolation issue in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, 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 2026-08-20 15:33 UTC
CWE
- CWE-346 - Origin Validation Error
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) |
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CVE-2026-74980 (GCVE-0-2026-74980)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:21
VLAI
EPSS
VEX
Title
Clickjacking issue in the Downloads component in Firefox for Android
Summary
Clickjacking issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 15:32 UTC
CWE
- CWE-1021 - Improper Restriction of Rendered UI Layers or Frames
Assigner
References
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CVE-2026-74979 (GCVE-0-2026-74979)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Mitigation bypass in the Add-ons Manager component
Summary
Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 18:54 UTC
CWE
- CWE-284 - Improper Access Control
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) |
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CVE-2026-74978 (GCVE-0-2026-74978)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:57
VLAI
EPSS
VEX
Title
Clickjacking issue in the Widget component
Summary
Clickjacking issue in the Widget component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, 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 2026-08-18 18:57 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) |
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CVE-2026-74977 (GCVE-0-2026-74977)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:59
VLAI
EPSS
VEX
Title
Integer overflow in the Graphics component
Summary
Integer overflow in the Graphics 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 18:59 UTC
CWE
- CWE-190 - Integer Overflow or Wraparound
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) |
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CVE-2026-74975 (GCVE-0-2026-74975)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 14:48
VLAI
EPSS
VEX
Title
Spoofing issue in the Downloads component in Firefox for Android
Summary
Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 154.
Severity
5.4 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 14:48 UTC
CWE
- CWE-451 - User Interface (UI) Misrepresentation of Critical Information
Assigner
References
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CVE-2026-74970 (GCVE-0-2026-74970)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Site isolation issue in the Graphics component
Summary
Site isolation issue in the Graphics component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, 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 15:40 UTC
CWE
- CWE-346 - Origin Validation Error
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) |
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CVE-2026-74968 (GCVE-0-2026-74968)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 18:55
VLAI
EPSS
VEX
Title
Site isolation issue in the Graphics: WebRender component
Summary
Site isolation issue in the Graphics: WebRender component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, 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 15:13 UTC
CWE
- CWE-346 - Origin Validation Error
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) |
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CVE-2026-74966 (GCVE-0-2026-74966)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-20 17:22
VLAI
EPSS
VEX
Title
Information disclosure in the Form Autofill component
Summary
Information disclosure in the Form Autofill 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 2026-08-20 15:30 UTC
CWE
- CWE-359 - Exposure of Private Personal Information to an Unauthorized Actor
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) |
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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) |
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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) |
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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) |
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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) |
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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) |
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CVE-2026-74952 (GCVE-0-2026-74952)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55
VLAI
EPSS
VEX
Title
Privilege escalation in the Application Update component
Summary
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.
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:
154 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
154 , ≤ *
(rpm)
|
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CVE-2026-74951 (GCVE-0-2026-74951)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:13
VLAI
EPSS
VEX
Title
Clickjacking issue in Firefox for Android
Summary
Clickjacking issue in Firefox for Android. This vulnerability was fixed in Firefox 154.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:13 UTC
CWE
- CWE-1021 - Improper Restriction of Rendered UI Layers or Frames
Assigner
References
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CVE-2026-74950 (GCVE-0-2026-74950)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 03:55
VLAI
EPSS
VEX
Title
Privilege escalation in the Downloads API component
Summary
Privilege escalation in the Downloads API 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) |
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CVE-2026-74947 (GCVE-0-2026-74947)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-21 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 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-763 - Release of Invalid Pointer or Reference
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) |
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CVE-2026-74938 (GCVE-0-2026-74938)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:17
VLAI
EPSS
VEX
Title
Mitigation bypass in the JavaScript: GC component
Summary
Mitigation bypass in the JavaScript: GC 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 19:17 UTC
CWE
- CWE-693 - Protection Mechanism Failure
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) |
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CVE-2026-74937 (GCVE-0-2026-74937)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:21
VLAI
EPSS
VEX
Title
Use-after-free in the JavaScript: GC component
Summary
Use-after-free in the JavaScript: GC 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 2026-08-18 19:20 UTC
CWE
- CWE-416 - Use After Free
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) |
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CVE-2026-75874 (GCVE-0-2026-75874)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:24
VLAI
EPSS
VEX
Title
Sandbox escape in the Remote Settings Client component
Summary
Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.
Severity
10 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:23 UTC
CWE
- CWE-693 - Protection Mechanism Failure
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
154 , ≤ *
(rpm)
|
|
| Mozilla | Thunderbird |
Unaffected:
154 , ≤ *
(rpm)
|
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CVE-2026-74990 (GCVE-0-2026-74990)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-18 19:28
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird ESR 140.14, Thunderbird ESR 153.1 and Thunderbird 154
Summary
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.
Severity
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-18 19:27 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Mozilla | Firefox |
Unaffected:
115.39 , ≤ 115.*
(rpm)
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) |
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CVE-2026-74987 (GCVE-0-2026-74987)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-19 13:05
VLAI
EPSS
VEX
Title
Internally found bugs fixed in Thunderbird ESR 140.14, Thunderbird ESR 153.1 and Thunderbird 154
Summary
Internally found bugs present in Thunderbird ESR 140.13, Thunderbird ESR 153.0 and Thunderbird 153. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. 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
9.8 (Critical)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-19 13:05 UTC
CWE
- CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
Assigner
References
9 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) |
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CVE-2026-74983 (GCVE-0-2026-74983)
Vulnerability from cvelistv5 – Published: 2026-08-18 12:23 – Updated: 2026-08-19 13:35
VLAI
EPSS
VEX
Title
Mitigation bypass in the Data Loss Prevention component
Summary
Mitigation bypass in the Data Loss Prevention 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 13:35 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) |
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