# Mozilla Firefox (en-US) 112.0

Mozilla Firefox (en-US) 112.0, released April 12, 2023, fixes 18 CVEs in Mozilla Firefox (en-US). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Firefox (en-US) is 159.0, which also fixes every one of these CVEs.

- Web page: https://patchblox.com/security/fix/windows-app/mozilla.firefox-112.0
- Platform: Windows apps
- Released: Apr 12, 2023
- Priority: Urgent (Closes CVE-2023-29542, rated Critical)
- CVEs: 18, exploited: 0, on CISA KEV: 0
- Superseded by: [Mozilla Firefox (en-US) 159.0](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md), the latest version, which also fixes every CVE listed here

## Applies to

| Product | Release | Fixed in |
|---|---|---|
| [Mozilla Firefox (en-US)](https://patchblox.com/security/data/product/windows-app/mozilla-firefox-en-us.md) |  | 112.0 |

## CVEs this fix closes

| CVE | Priority | Title | CVSS | EPSS | Exploitation |
|---|---|---|---:|---:|---|
| [CVE-2023-29542](https://patchblox.com/security/data/cve/CVE-2023-29542.md) | Urgent | Mozilla Firefox and 4 others: A newline in a filename could have been used to bypass the file extension security mechanisms that replace… | 9.8 | 0.0094 |  |
| [CVE-2023-29535](https://patchblox.com/security/data/cve/CVE-2023-29535.md) | High | Mozilla Firefox and 4 others: Following a Garbage Collector compaction, weak maps may have been accessed before they were correctly… | 7.5 | 0.0075 |  |
| [CVE-2023-29541](https://patchblox.com/security/data/cve/CVE-2023-29541.md) | High | Mozilla Firefox and 4 others: Improper Encoding or Escaping of Output | 8.8 | 0.0074 |  |
| [CVE-2023-29539](https://patchblox.com/security/data/cve/CVE-2023-29539.md) | High | Mozilla Firefox and 4 others: When handling the filename directive in the Content-Disposition header, the filename would be truncated… | 8.8 | 0.0074 |  |
| [CVE-2023-29550](https://patchblox.com/security/data/cve/CVE-2023-29550.md) | High | Mozilla Firefox and 4 others: Memory safety bugs present in Firefox 111 and Firefox ESR 102.9. | 8.8 | 0.0071 |  |
| [CVE-2023-29536](https://patchblox.com/security/data/cve/CVE-2023-29536.md) | High | Mozilla Firefox and 4 others: An attacker could cause the memory manager to incorrectly free a pointer that addresses attacker-controlled… | 8.8 | 0.0070 |  |
| [CVE-2023-29533](https://patchblox.com/security/data/cve/CVE-2023-29533.md) | High | Mozilla Firefox and 4 others: A website could have obscured the fullscreen notification by using a combination of <code>window.open</code>,… | 7.5 | 0.0057 |  |
| [CVE-2023-29537](https://patchblox.com/security/data/cve/CVE-2023-29537.md) | High | Mozilla Firefox and 2 others: Multiple race conditions in the font initialization could have led to memory corruption and execution… | 7.5 | 0.0056 |  |
| [CVE-2023-29543](https://patchblox.com/security/data/cve/CVE-2023-29543.md) | High | Mozilla Firefox and 2 others: Improper Encoding or Escaping of Output | 8.8 | 0.0053 |  |
| [CVE-2023-29551](https://patchblox.com/security/data/cve/CVE-2023-29551.md) | High | Mozilla Firefox and 2 others: Out-of-bounds Write | 8.8 | 0.0053 |  |
| [CVE-2023-29548](https://patchblox.com/security/data/cve/CVE-2023-29548.md) | Routine | Mozilla Firefox and 4 others: A wrong lowering instruction in the ARM64 Ion compiler resulted in a wrong optimization result. | 6.5 | 0.0070 |  |
| [CVE-2023-29545](https://patchblox.com/security/data/cve/CVE-2023-29545.md) | Routine | Mozilla Firefox and 4 others: Similar to CVE-2023-28163, this time when choosing 'Save Link As', suggested filenames containing environment… | 6.5 | 0.0058 |  |
| [CVE-2023-29547](https://patchblox.com/security/data/cve/CVE-2023-29547.md) | Routine | Mozilla Firefox and 2 others: When a secure cookie existed in the Firefox cookie jar an insecure cookie for the same domain could have… | 6.5 | 0.0047 |  |
| [CVE-2023-29544](https://patchblox.com/security/data/cve/CVE-2023-29544.md) | Routine | Mozilla Firefox and 2 others: If multiple instances of resource exhaustion occurred at the incorrect time, the garbage collector could… | 6.5 | 0.0045 |  |
| [CVE-2023-29538](https://patchblox.com/security/data/cve/CVE-2023-29538.md) | Routine | Mozilla Firefox and 2 others: Under specific circumstances a WebExtension may have received a <code>jar:file:///</code> URI instead… | 4.3 | 0.0040 |  |
| [CVE-2023-29549](https://patchblox.com/security/data/cve/CVE-2023-29549.md) | Routine | Mozilla Firefox and 2 others: Inadequate Encryption Strength | 6.5 | 0.0033 |  |
| [CVE-2023-29540](https://patchblox.com/security/data/cve/CVE-2023-29540.md) | Routine | Mozilla Firefox and 2 others: Using a redirect embedded into <code>sourceMappingUrls</code> could allow for navigation to external… | 6.1 | 0.0032 |  |
| [CVE-2023-29532](https://patchblox.com/security/data/cve/CVE-2023-29532.md) | Routine | Mozilla Firefox and 4 others: A local attacker can trick the Mozilla Maintenance Service into applying an unsigned update file by pointing… | 5.5 | 0.0019 |  |

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Data as of 2026-11-09T01:18:40Z 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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