CVE-2026-100766
Fixed in a distro release EPSS <1%CVSS 4.3
Information disclosure in the Networking: JAR 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.
Products: Mozilla Firefox, Mozilla Thunderbird
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Debian:12 | firefox-esr | 153.4.0esr-1~deb12u1 |
| Debian:12 | thunderbird | 1:140.17.0esr-1~deb12u1 |
| Debian:13 | firefox-esr | 153.4.0esr-1~deb13u1 |
| Debian:13 | thunderbird | 1:140.17.0esr-1~deb13u1 |
| Debian:14 | firefox-esr | 153.4.0esr-1 |
| Debian:14 | thunderbird | 1:153.4.0esr-1 |
| Rocky Linux:10 | firefox | 0:140.17.0-1.el10_2 |
| Rocky Linux:10 | thunderbird | 0:140.17.0-1.el10_2 |
| Rocky Linux:8 | firefox | 0:140.17.0-1.el8_10 |
| Rocky Linux:9 | firefox | 0:140.17.0-1.el9_8 |
| Rocky Linux:9 | thunderbird | 0:140.17.0-1.el9_8 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-LTSS | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOS | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP5-LTSS | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Module for Desktop Applications 15 SP7 | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Module for Package Hub 15 SP7 | MozillaThunderbird | 153.4.0-150400.13.6.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | MozillaFirefox | 153.4.0-118.11.1 |
| SUSE:Linux Enterprise Server 15 SP4-LTSS | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Server 15 SP5-LTSS | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Server 15 SP6-LTSS | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Server 16.0 | MozillaFirefox | 153.4.0-160000.1.1 |
| SUSE:Linux Enterprise Server LTSS Extended Security 12 SP5 | MozillaFirefox | 153.4.0-118.11.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP4 | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP5 | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Server for SAP Applications 15 SP6 | MozillaFirefox | 153.4.0-150400.157.11.1 |
| SUSE:Linux Enterprise Server for SAP applications 16.0 | MozillaFirefox | 153.4.0-160000.1.1 |
| SUSE:Linux Enterprise Workstation Extension 15 SP7 | MozillaThunderbird | 153.4.0-150400.13.6.1 |
| Ubuntu:18.04:LTS | mozjs38 | no fix |
| Ubuntu:18.04:LTS | mozjs52 | no fix |
| Ubuntu:20.04:LTS | mozjs52 | no fix |
| Ubuntu:20.04:LTS | mozjs68 | no fix |
| Ubuntu:22.04:LTS | mozjs102 | no fix |
| Ubuntu:22.04:LTS | mozjs78 | no fix |
| Ubuntu:22.04:LTS | mozjs91 | no fix |
| Ubuntu:22.04:LTS | thunderbird | no fix |
| Ubuntu:24.04:LTS | mozjs102 | no fix |
| Ubuntu:24.04:LTS | mozjs115 | no fix |
| openSUSE:Leap 16.0 | MozillaFirefox | 153.4.0-160000.1.1 |
| openSUSE:Tumbleweed | MozillaFirefox | 157.0.1-1.1 |
| openSUSE:Tumbleweed | MozillaThunderbird | 153.4.0-1.1 |
| openSUSE:Tumbleweed | firefox-esr | 153.4.0-1.1 |