CVE-2026-2793
Critical · 9.8CVSS
9.8
EPSS
0.7%
Published
Feb 24, 2026
CISA due date
—
The record
Memory safety bugs present in Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Module for Package Hub 15 SP7 | MozillaThunderbird | 0 | 140.8.0-150200.8.260.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | MozillaFirefox | 0 | 140.8.0-112.301.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | MozillaFirefox | 0 | 140.8.0-112.301.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| SUSE:Linux Enterprise Workstation Extension 15 SP7 | MozillaThunderbird | 0 | 140.8.0-150200.8.260.1 |
| openSUSE:Leap 15.6 | MozillaFirefox | 0 | 140.8.0-150200.152.222.1 |
| openSUSE:Leap 15.6 | MozillaThunderbird | 0 | 140.8.0-150200.8.260.1 |
| openSUSE:Leap 16.0 | MozillaFirefox | 0 | 140.8.0-160000.1.1 |
| openSUSE:Leap 16.0 | MozillaThunderbird | 0 | 140.8.1-bp160.1.1 |
| openSUSE:Tumbleweed | MozillaFirefox | 0 | 148.0-1.1 |
| openSUSE:Tumbleweed | MozillaThunderbird | 0 | 140.8.0-1.1 |
| openSUSE:Tumbleweed | firefox-esr | 0 | 140.8.0-1.1 |
Related vulnerabilities
- CVE-2026-4716 Incorrect boundary conditions, uninitialized memory in the JavaScript Engine component. Also affects MozillaFirefox
- CVE-2026-4718 Undefined behavior in the WebRTC: Signaling component. Also affects MozillaFirefox
- CVE-2026-4713 Incorrect boundary conditions in the Graphics component. Also affects MozillaFirefox
- CVE-2026-4714 Incorrect boundary conditions in the Audio/Video component. Also affects MozillaFirefox
- CVE-2026-4717 Privilege escalation in the Netmonitor component. Also affects MozillaFirefox
- CVE-2026-4711 Use-after-free in the Widget: Cocoa component. Also affects MozillaFirefox
- CVE-2026-4720 Memory safety bugs present in Firefox ESR 140.8, Thunderbird ESR 140.8, Firefox 148 and… Also affects MozillaFirefox
- CVE-2026-4712 Information disclosure in the Widget: Cocoa component. Also affects MozillaFirefox