- Top reward
- $15,000
- Top severity paid
- Critical
- Assets in scope
- 24
- Public CVEs
- 60
- Last change
At a glance
What to know before you start testing.
- Pays up to $15,000
- for critical bugs.
- Report on HackerOne
- Submit through the program page.
Rewards
What HackerOne lists as the payout for each severity.
| Severity | Relative size | Reward |
|---|---|---|
| Critical |
|
$15,000 from $3,000 |
| High |
|
$6,000 from $1,000 |
Earlier reward tables (1)
- 12 Nov 2026 to 12 Nov 2026: Critical up to $15,000
Scope
24 assets you may test.
Web 21
- accounts.firefox.com Critical
- addons.allizom.org Critical
- aus5.mozilla.org Critical
- bugzilla.mozilla.org Critical
- crash-reports.allizom.org Critical
- crash-stats.allizom.org Critical
- developer.mozilla.org Critical
- firefox-ci-tc.services.mozilla.com Critical
- firefox.settings.services.mozilla.com Critical
- hg.mozilla.org Critical
- lando.services.mozilla.com Critical
- merino.services.mozilla.com Critical
- monitor.mozilla.org Critical
- phabricator.allizom.org Critical
- pontoon.allizom.org Critical
- relay.firefox.com Critical
- support.mozilla.org Critical
- sync.services.mozilla.com Critical
- vpn.mozilla.org Critical
- www.firefox.com Critical
- www.mozilla.org Critical
Products and areas 3
- Firefox Homepage Newtab No bounty
- Mozilla Ad Routing Service No bounty
- Product Delivery No bounty
Changes
Tracked since 12 Nov 2026. Last checked 1 hour ago.
No changes yet. When the rewards or scope move, you will see it here and in the RSS feed.
Before we tracked it
Scope and reward changes recorded before this page started tracking it.
-
Rules updated
Added: “…//bugzilla.mozilla.org/form.web.bounty) or [email protected]. Reports already submitted are unaffected. [Read the full notice](https://hackerone.com/mozilla...”
-
Rules updated
Added: “Paused: This program is not accepting new submissions beginning September 11, 2026. We will reopen the program in Q1 2027. Report critical severity findings via...”
-
Rules updated
Added: “Remote Code Execution from an unauthenticated public internet position (note that RCE on Taskcluster without demonstrating additional impact such as privilege...”
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-2026-100809 | 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-2026-100805 | 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-2026-100811 | 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 |