Mozilla Bug Bounty
By Mozilla Bug bounty on Self-hosted mozilla.org
Accepting reports
Full safe harbor
- Top reward
- $20,000
- Top severity paid
- Not published
- Assets in scope
- 0
- Public CVEs
- 60
- Last change
- No changes yet
At a glance
What to know before you start testing.
- Pays up to $20,000
- top reward, from $3,000.
- Report by email
- [email protected]
- Full safe harbor
- Good-faith research is authorised; no legal action.
- Publish after a fix
- Coordinate the timing with the company.
Rewards
What the company's own policy page says it pays.
The policy page has no reward table. Here is what it says, in its own words.
- Pays cash
-
Yes
We will pay bounties for vulnerabilities in third-party libraries incorporated into shipped client code or third-party websites utilized by Mozilla.
- Safe harbor
-
Full
we will not threaten or bring any legal action against anyone who makes a good faith effort to comply with this Bug Bounty Program, or for any accidental or good faith violation of this policy.
Summarised with AI from the company's policy, read 12 Nov 2026, and checked word for word against it. Read the original
Reward range in US dollars. Self-hosted's own page has the details.
Scope
0 assets you may test.
Self-hosted does not list the scope of this program publicly. Check its policy.
Rules
What the policy asks of you, and the bug types it won't reward, quoted from Mozilla Bug Bounty's policy. "We" in these lines means the program, not this site.
While testing
-
You should use your best effort not to access, modify, delete, or store user data or Mozilla’s data. Instead, use your own accounts or test accounts for security research purposes.
-
You should also use your best effort not to harm the availability or stability of our services, for example, by running aggressive scanning of those services.
-
Whenever it is explicitly stated in our program scope, you are expected to test on the provided instances (e.g. staging) instead of production.
-
You must not exploit the security vulnerability for your own gain.
-
Before sharing any part of the security issue with a third party, you must give us a reasonable amount of time to address the security issue.
-
Do not threaten or attempt to extort Mozilla.
Summarised with AI from the company's policy, read 12 Nov 2026, and checked word for word against it. Read the original
Changes
Tracked since 11 Nov 2026. Last checked 5 hours ago.
No changes yet. When the rewards or scope move, you will see it here and in the RSS feed.
Public CVEs
Published vulnerabilities in this vendor's products, from the NVD.
| CVE | Summary | Severity | Published |
|---|---|---|---|
| CVE-2026-106016 | Mitigation bypass in the File Handling component. This vulnerability was fixed in Firefox 157.0.1 and Thunderbird 158. | Critical 9.8 | 6 Oct 2026 |
| CVE-2026-103500 | An attacker could cause a heap buffer overflow by getting a user to open an email that is greater than or equal to 2GB in size. This vulnerability was fixed in Thunderbird 157, Thunderbird 140.17, and Thunderbird 153.4. | Medium 6.1 | 30 Sep 2026 |
| CVE-2026-96869 | Information disclosure in the Networking component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | Medium 4.3 | 29 Sep 2026 |
| CVE-2026-100822 | Spoofing issue in the Networking: HTTP component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Medium 5.4 | 29 Sep 2026 |
| CVE-2026-100823 | Spoofing issue in the Downloads component in Firefox for Android. This vulnerability was fixed in Firefox 157. | Medium 5.4 | 29 Sep 2026 |
| CVE-2026-100824 | Privilege escalation in the Places component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100825 | Use-after-free in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100826 | Denial-of-service in the Storage: StorageManager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Medium 6.5 | 29 Sep 2026 |
| CVE-2026-100828 | Mitigation bypass in the Bookmarks & History component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100829 | Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100830 | Mitigation bypass in the DOM: Navigation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.1 | 29 Sep 2026 |
| CVE-2026-100831 | Use-after-free in the DOM: UI Events & Focus Handling component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100832 | Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 140.17, Thunderbird 153.4, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100814 | Incorrect boundary conditions in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100815 | Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100816 | Site isolation issue in the DOM: Networking component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.1 | 29 Sep 2026 |
| CVE-2026-100817 | Other issue in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | Medium 5.4 | 29 Sep 2026 |
| CVE-2026-100818 | Sandbox escape due to use-after-free in the Widget: Gtk component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100819 | Sandbox escape due to incorrect boundary conditions in the XPCOM component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100820 | Privilege escalation in the Address Bar component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100821 | Site isolation issue in the Panning and Zooming component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | Medium 4.7 | 29 Sep 2026 |
| CVE-2026-100805 | Race condition, use-after-free in the Audio/Video component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | High 7.5 | 29 Sep 2026 |
| CVE-2026-100806 | Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Medium 4.3 | 29 Sep 2026 |
| CVE-2026-100807 | Privilege escalation in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100808 | Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100809 | Same-origin policy bypass in the DevTools component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.1 | 29 Sep 2026 |
| CVE-2026-100810 | Other issue in the DevTools component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | Critical 9.8 | 29 Sep 2026 |
| CVE-2026-100811 | Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100812 | Denial-of-service in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Medium 6.5 | 29 Sep 2026 |
| CVE-2026-100813 | Invalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100795 | Denial-of-service in the Networking component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | Medium 6.5 | 29 Sep 2026 |
| CVE-2026-100796 | Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100797 | Privilege escalation due to use-after-free in the Graphics: WebRender component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100798 | Cryptography misuse in Storage: Quota Manager component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | High 8.1 | 29 Sep 2026 |
| CVE-2026-100799 | Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | Medium 4.3 | 29 Sep 2026 |
| CVE-2026-100800 | Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100801 | Privilege escalation in the DLL Services component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 159, Firefox ESR 153.6, Thunderbird 159, Thunderbird 153.6, Firefox 157, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100802 | Uninitialized memory in the Graphics: WebGPU component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | Medium 4.3 | 29 Sep 2026 |
| CVE-2026-100803 | Same-origin policy bypass in the WebExtensions component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.1 | 29 Sep 2026 |
| CVE-2026-100804 | Sandbox escape due to use-after-free in the Preferences: Backend component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100786 | Sandbox escape due to use-after-free in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100787 | Sandbox escape in the XUL component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100788 | Invalid pointer in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | Critical 9.8 | 29 Sep 2026 |
| CVE-2026-100789 | Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100790 | Use-after-free in the XSLT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100791 | Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100792 | JIT miscompilation in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | High 7.1 | 29 Sep 2026 |
| CVE-2026-100793 | JIT miscompilation in the JavaScript Engine component. This vulnerability was fixed in Thunderbird 157 and Firefox 157. | Medium 6.5 | 29 Sep 2026 |
| CVE-2026-100794 | Sandbox escape due to incorrect boundary conditions in the Internationalization component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100778 | Sandbox escape due to use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100779 | Use-after-free in the XSLT component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100780 | Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100781 | Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100782 | Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100783 | Uninitialized memory in the Audio/Video component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | Medium 4.3 | 29 Sep 2026 |
| CVE-2026-100784 | Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100785 | Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100775 | Sandbox escape in the Graphics component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | Critical 9.6 | 29 Sep 2026 |
| CVE-2026-100776 | Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |
| CVE-2026-100777 | Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17. | High 8.8 | 29 Sep 2026 |