CVE-2026-8974— Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151
Possible ATT&CK Techniques 1AI
T1203 · Exploitation for Client ExecutionAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mozilla | Firefox | 140.11≤ 140.* | unaffected |
151≤ * | unaffected | ||
| Mozilla | Thunderbird | 140.11≤ 140.* | unaffected |
151≤ * | unaffected |
Get alerts for future matching vulnerabilitiesLog in to subscribe
I. Basic Information for CVE-2026-8974
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗ Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
Memory safety bugs fixed in Thunderbird 140.11 and Thunderbird 151
Source: NVD (National Vulnerability Database)
Vulnerability Description
Memory safety bugs present in Thunderbird 140.10 and Thunderbird 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Mozilla Thunderbird 缓冲区错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Mozilla Thunderbird是美国Mozilla基金会的一套从Mozilla Application Suite独立出来的电子邮件客户端软件。该软件支持IMAP、POP邮件协议以及HTML邮件格式。 Mozilla Thunderbird 140.10版本和150版本存在缓冲区错误漏洞，该漏洞源于内存安全缺陷，可能导致内存损坏，进而被利用执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mozilla | Firefox | 140.11 ~ 140.* | - | |
| Mozilla | Thunderbird | 140.11 ~ 140.* | - |
II. Public POCs for CVE-2026-8974
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POCPremium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-8974
请登录查看更多情报信息。
Same Patch Batch · Mozilla · 2026-05-19 · 32 CVEs total
| CVE-2026-8960 | Spoofing issue in WebExtensions | |
| CVE-2026-8945 | Sandbox escape in Firefox and Firefox Focus for Android | |
| CVE-2026-8946 | Incorrect boundary conditions in the Audio/Video: Web Codecs component | |
| CVE-2026-8947 | Use-after-free in the DOM: Bindings (WebIDL) component | |
| CVE-2026-8948 | Same-origin policy bypass in the DOM: Networking component | |
| CVE-2026-8949 | Integer overflow in the Widget: Win32 component | |
| CVE-2026-8950 | Same-origin policy bypass in the Networking: HTTP component | |
| CVE-2026-8951 | Spoofing issue in the Toolbar component in Firefox for Android | |
| CVE-2026-8952 | Privilege escalation in the Application Update component | |
| CVE-2026-8953 | Sandbox escape due to use-after-free in the Disability Access APIs component | |
| CVE-2026-8954 | Incorrect boundary conditions, integer overflow in the Audio/Video component | |
| CVE-2026-8955 | Privilege escalation in the DOM: Workers component | |
| CVE-2026-8956 | Integer overflow in the Networking: JAR component | |
| CVE-2026-8957 | Privilege escalation in the Enterprise Policies component | |
| CVE-2026-8958 | Information disclosure, sandbox escape in the Security: Process Sandboxing component | |
| CVE-2026-8959 | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | |
| CVE-2026-8706 | Sensitive user data could be leaked to other applications through Reader mode | |
| CVE-2026-8961 | Spoofing issue in the Form Autofill component | |
| CVE-2026-8962 | Mitigation bypass in the DOM: Security component | |
| CVE-2026-8963 | Spoofing issue in the Web Speech component |
Showing top 20 of 32 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Firefox
- CVE-2026-8975
Memory safety bugs fixed in Thunderbird 140.11 and Thunderbi - CVE-2026-8973
Memory safety bugs fixed in Thunderbird 151 - CVE-2026-8972
Privilege escalation in the WebRTC: Audio/Video component - CVE-2026-8971
Same-origin policy bypass in the Networking: JAR component - CVE-2026-8970
Privilege escalation in the Security component
Same vendor: Mozilla
- CVE-2026-8706
Sensitive user data could be leaked to other applications th - CVE-2026-8975
Memory safety bugs fixed in Thunderbird 140.11 and Thunderbi - CVE-2026-8973
Memory safety bugs fixed in Thunderbird 151 - CVE-2026-8972
Privilege escalation in the WebRTC: Audio/Video component - CVE-2026-8971
Same-origin policy bypass in the Networking: JAR component
V. Comments for CVE-2026-8974
No comments yet