Mozilla Firefox ESR (af) 153.3.0
Mozilla Firefox ESR (af) 153.3.0, released September 15, 2026, fixes 63 CVEs in Mozilla Firefox ESR (af). None of them is reported as exploited. Patch Radar priority: Urgent. The latest Mozilla Firefox ESR (af) is 153.7.0, which also fixes every one of these CVEs.
Superseded. The latest Mozilla Firefox ESR (af) is 153.7.0, which also fixes every CVE on this page. Install that instead.
Priority of the 63 CVEs
Applies to
| Product | Version |
|---|---|
| Mozilla Firefox ESR (af) | 153.3.0 |
CVEs this fix closes
| Priority | CVE | Title | CVSS | EPSS | Exploitation |
|---|---|---|---|---|---|
| Urgent | CVE-2026-92038 | Mitigation bypass in the Remote Settings Client component | 9.1 | 0.0032 | None reported |
| Urgent | CVE-2026-92041 | Mitigation bypass in the DOM: Networking component | 9.1 | 0.0032 | None reported |
| Urgent | CVE-2026-92075 | Mitigation bypass in the Networking component | 9.1 | 0.0032 | None reported |
| Urgent | CVE-2026-92045 | Sandbox escape due to incorrect boundary conditions in the WebRTC component | 9.6 | 0.0030 | None reported |
| Urgent | CVE-2026-92048 | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | 9.0 | 0.0028 | None reported |
| Urgent | CVE-2026-92057 | Mitigation bypass in the Enterprise Policies component | 9.1 | 0.0025 | None reported |
| Urgent | CVE-2026-92079 | Mitigation bypass in the Widget: Win32 component | 9.1 | 0.0025 | None reported |
| Urgent | CVE-2026-92071 | Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component | 9.6 | 0.0024 | None reported |
| Urgent | CVE-2026-92059 | Incorrect boundary conditions in the DOM: Editor component | 9.3 | 0.0011 | None reported |
| High | CVE-2026-92005 | Use-after-free in the Audio/Video: Web Codecs component | 7.5 | 0.0036 | None reported |
| High | CVE-2026-92018 | Sandbox escape in the DOM: Core & HTML component | 9.6 | 0.0033 | None reported |
| High | CVE-2026-92035 | Sandbox escape due to incorrect boundary conditions in the Graphics component | 9.6 | 0.0033 | None reported |
| High | CVE-2026-92006 | Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component | 8.8 | 0.0033 | None reported |
| High | CVE-2026-92044 | Information disclosure in the Networking: HTTP component | 7.5 | 0.0032 | None reported |
| High | CVE-2026-92032 | Sandbox escape due to invalid pointer in the Graphics component | 9.6 | 0.0032 | None reported |
| High | CVE-2026-92022 | Use-after-free in the DOM: HTML Parser component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-92023 | Use-after-free in the XML component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-92024 | Use-after-free in the SVG component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-92025 | Use-after-free in the DOM: Navigation component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-92027 | Use-after-free in the DOM: Streams component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-92028 | Use-after-free in the DOM: Core & HTML component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-92029 | Use-after-free in the SVG component | 8.8 | 0.0032 | None reported |
| High | CVE-2026-92016 | Use-after-free in the Disability Access APIs component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-92026 | Use-after-free in the Networking component | 8.8 | 0.0031 | None reported |
| High | CVE-2026-92019 | Mitigation bypass in the Remote Settings Client component | 8.1 | 0.0031 | None reported |
Patch Radar data is free to use with attribution. Terms and how to credit it.
Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.