# Firefox Developer Edition (en-US) 127.0

Firefox Developer Edition (en-US) 127.0, released May 14, 2024, fixes 15 CVEs in Firefox Developer Edition (en-US). None of them is reported as exploited. Patch Radar priority: High. The latest Firefox Developer Edition (en-US) is 156.0, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/mozilla.firefox.developeredition-127.0
- Platform: Windows apps
- Released: May 14, 2024
- Priority: High (Closes CVE-2024-5688, high severity)
- CVEs: 15, exploited: 0, on CISA KEV: 0
- Superseded by: [Firefox Developer Edition (en-US) 156.0](https://patchblox.com/security/data/product/windows-app/firefox-developer-edition-en-us.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Firefox Developer Edition (en-US)](https://patchblox.com/security/data/product/windows-app/firefox-developer-edition-en-us.md) |  | 127.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2024-5688](https://patchblox.com/security/data/cve/CVE-2024-5688.md) | High | Mozilla Firefox ESR and 6 others: Use After Free | 8.1 | 0.0107 |  |
| [CVE-2024-5696](https://patchblox.com/security/data/cve/CVE-2024-5696.md) | High | Mozilla Firefox ESR and 6 others: Out-of-bounds Write | 8.6 | 0.0081 |  |
| [CVE-2024-5699](https://patchblox.com/security/data/cve/CVE-2024-5699.md) | High | Mozilla Firefox ESR and 4 others: Improper Handling of Case Sensitivity | 9.8 | 0.0077 |  |
| [CVE-2024-5695](https://patchblox.com/security/data/cve/CVE-2024-5695.md) | High | Mozilla Firefox ESR and 4 others: Out-of-bounds Write | 9.8 | 0.0058 |  |
| [CVE-2024-5701](https://patchblox.com/security/data/cve/CVE-2024-5701.md) | High | Mozilla Firefox ESR and 4 others: Out-of-bounds Write | 9.8 | 0.0058 |  |
| [CVE-2024-5694](https://patchblox.com/security/data/cve/CVE-2024-5694.md) | High | Mozilla Firefox ESR and 4 others: Use After Free | 7.5 | 0.0047 |  |
| [CVE-2024-5700](https://patchblox.com/security/data/cve/CVE-2024-5700.md) | High | Mozilla Firefox ESR and 6 others: Access of Memory Location Before Start of Buffer | 7.5 | 0.0044 |  |
| [CVE-2024-5690](https://patchblox.com/security/data/cve/CVE-2024-5690.md) | Routine | Mozilla Firefox ESR and 6 others: Observable Discrepancy | 6.1 | 0.0074 |  |
| [CVE-2024-5691](https://patchblox.com/security/data/cve/CVE-2024-5691.md) | Routine | Mozilla Firefox ESR and 6 others: Protection Mechanism Failure | 6.1 | 0.0065 |  |
| [CVE-2024-5692](https://patchblox.com/security/data/cve/CVE-2024-5692.md) | Routine | Mozilla Firefox ESR and 6 others: On Windows 10, when using the 'Save As' functionality, an attacker could have tricked the browser into… | 6.5 | 0.0062 |  |
| [CVE-2024-5693](https://patchblox.com/security/data/cve/CVE-2024-5693.md) | Routine | Mozilla Firefox ESR and 6 others: Inclusion of Functionality from Untrusted Control Sphere | 6.1 | 0.0058 |  |
| [CVE-2024-5687](https://patchblox.com/security/data/cve/CVE-2024-5687.md) | Routine | Mozilla Firefox ESR and 4 others: Improper Access Control | 5.3 | 0.0041 |  |
| [CVE-2024-5689](https://patchblox.com/security/data/cve/CVE-2024-5689.md) | Routine | Mozilla Firefox ESR and 4 others: In addition to detecting when a user was taking a screenshot (XXX), a website was able to overlay the… | 4.3 | 0.0040 |  |
| [CVE-2024-5697](https://patchblox.com/security/data/cve/CVE-2024-5697.md) | Routine | Mozilla Firefox ESR and 4 others: Observable Discrepancy | 4.3 | 0.0040 |  |
| [CVE-2024-5698](https://patchblox.com/security/data/cve/CVE-2024-5698.md) | Routine | Mozilla Firefox ESR and 4 others: User Interface (UI) Misrepresentation of Critical Information | 6.1 | 0.0038 |  |

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Data as of 2026-11-08T13:06:02Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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