CVE-2026-12308— Memory safety bug fixed in Thunderbird 152
Possible ATT&CK Techniques 1AI
T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 4
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Mozilla | Firefox | 140.12≤ 140.* | unaffected |
152≤ * | unaffected | ||
| Mozilla | Thunderbird | 140.12≤ 140.* | unaffected |
152≤ * | unaffected |
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I. Basic Information for CVE-2026-12308
Vulnerability Information
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Vulnerability Title
Memory safety bug fixed in Thunderbird 152
Source: NVD (National Vulnerability Database)
Vulnerability Description
Memory safety bug fixed in Thunderbird 152. This vulnerability was fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Mozilla | Firefox | 140.12 ~ 140.* | - | |
| Mozilla | Thunderbird | 140.12 ~ 140.* | - |
II. Public POCs for CVE-2026-12308
| # | POC Description | Source Link | Shenlong Link |
|---|
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No public POC found.
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Vendor Advisories for CVE-2026-12308 (4)
Same Patch Batch · Mozilla · 2026-06-16 · 44 CVEs total
| CVE-2026-12300 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12297 | Sandbox escape due to incorrect boundary conditions in the Networking component | |
| CVE-2026-12298 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12296 | Sandbox escape in the Security: Process Sandboxing component | |
| CVE-2026-12293 | Use-after-free in the Graphics: WebGPU component | |
| CVE-2026-12292 | Incorrect boundary conditions in the Web Audio component | |
| CVE-2026-12291 | Use-after-free in the Networking: HTTP component | |
| CVE-2026-12290 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12289 | Privilege escalation in the Graphics: WebRender component | |
| CVE-2026-12294 | Sandbox escape in the DOM: Workers component | |
| CVE-2026-12299 | JIT miscompilation in the DOM: Core & HTML component | |
| CVE-2026-12301 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12302 | Mitigation bypass in the DOM: Security component | |
| CVE-2026-12303 | Information disclosure due to incorrect boundary conditions in the Graphics: WebGPU compon | |
| CVE-2026-12304 | Same-origin policy bypass in the Networking: Cookies component | |
| CVE-2026-12305 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12306 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12307 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12309 | Memory safety bug fixed in Thunderbird 152 | |
| CVE-2026-12310 | Memory safety bug fixed in Thunderbird 152 |
Showing top 20 of 44 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Firefox
- CVE-2026-12330
Incorrect boundary conditions in the Internationalization co - CVE-2026-12329
Memory safety bug fixed in Thunderbird ESR 140.12 - CVE-2026-12328
Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR - CVE-2026-12327
Memory safety bugs fixed in Firefox ESR 140.12, Thunderbird - CVE-2026-12326
Memory safety bugs fixed in Firefox 152 and Thunderbird 152
Same vendor: Mozilla
- CVE-2026-53900
Cookie injection was possible when opening a PDF link - CVE-2026-53899
Cross-origin cookies could be leaked when opening a PDF link - CVE-2026-12330
Incorrect boundary conditions in the Internationalization co - CVE-2026-12329
Memory safety bug fixed in Thunderbird ESR 140.12 - CVE-2026-12328
Memory safety bugs fixed in Firefox ESR 115.37, Firefox ESR
V. Comments for CVE-2026-12308
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