Description
Privilege escalation in the Debugger component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mozilla | Firefox | — | 140.10 |
| Mozilla | Thunderbird | — | 140.10 |
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | firefox-esr | 140.10.0esr-1 | — |
| Debian 14 | thunderbird | 1:140.10.0esr-1 | — |
| Debian 13 | firefox-esr | 140.10.0esr-1~deb13u1 | — |
| Debian 13 | thunderbird | 1:140.10.0esr-1~deb13u1 | — |
| Debian 12 | firefox-esr | 140.10.0esr-1~deb12u1 | — |
| Debian 12 | thunderbird | 1:140.10.0esr-1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 24.04 LTS | mozjs102 +1 | No fix yet | — |
| Ubuntu 22.04 LTS | mozjs78 +3 | No fix yet | — |
| Ubuntu 20.04 LTS | mozjs52 +1 | No fix yet | — |
| Ubuntu 18.04 LTS | mozjs38 +1 | No fix yet | — |
Red Hat
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10 | firefox +1 | 140.10.0-1.el10_1 | RHSA-2026:19131, RHSA-2026:19041, RHSA-2026:12285 |
| RHEL 9 | firefox +2 | 140.10.0-1.el9_7 | RHSA-2026:19348, RHSA-2026:19201, RHSA-2026:15892 |
| RHEL 8 | firefox +1 | 140.10.0-1.el8_10 | RHSA-2026:13537, RHSA-2026:10766 |
Show 13 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| RHEL 10.0 EUS | firefox +1 | 140.10.0-1.el10_0 | RHSA-2026:19463, RHSA-2026:17690 |
| RHEL 9.6 EUS | firefox +2 | 140.10.0-1.el9_6 | RHSA-2026:19462, RHSA-2026:17688 |
| RHEL 9.4 EUS | firefox +2 | 140.10.0-1.el9_4 | RHSA-2026:19469, RHSA-2026:19464 |
| RHEL 9.2 E4S | firefox +2 | 140.10.0-1.el9_2 | RHSA-2026:19461, RHSA-2026:17689 |
| RHEL 9.0 E4S | firefox +1 | 140.10.0-1.el9_0 | RHSA-2026:19468, RHSA-2026:17687 |
| RHEL 8.8 TUS | firefox +1 | 140.10.0-1.el8_8 | RHSA-2026:19467, RHSA-2026:17477 |
| RHEL 8.8 E4S | firefox +1 | 140.10.0-1.el8_8 | RHSA-2026:19467, RHSA-2026:17477 |
| RHEL 8.6 TUS | firefox +1 | 140.10.0-1.el8_6 | RHSA-2026:19542, RHSA-2026:19466 |
| RHEL 8.6 E4S | firefox +1 | 140.10.0-1.el8_6 | RHSA-2026:19542, RHSA-2026:19466 |
| RHEL 8.6 AUS | firefox +1 | 140.10.0-1.el8_6 | RHSA-2026:19542, RHSA-2026:19466 |
| RHEL 8.4 EUS Long Life | firefox +1 | 140.10.0-1.el8_4 | RHSA-2026:19655, RHSA-2026:19465 |
| RHEL 8.4 AUS | firefox +1 | 140.10.0-1.el8_4 | RHSA-2026:19655, RHSA-2026:19465 |
| RHEL 7 ELS | firefox | 140.10.0-2.el7_9 | RHSA-2026:19704 |
AlmaLinux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux 10 | firefox | 140.10.0-1.el10_1 | ALSA-2026:10767 |
| AlmaLinux 10 | thunderbird | 140.10.0-1.el10_1.alma.1 | ALSA-2026:12285 |
| AlmaLinux 9 | firefox +2 | 140.10.0-1.el9_7.alma.1 | ALSA-2026:19348, ALSA-2026:15892, ALSA-2026:10757 |
| AlmaLinux 8 | firefox +1 | 140.10.0-1.el8_10.alma.1 | ALSA-2026:13537, ALSA-2026:10766 |
Rocky Linux
Errata ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Rocky Linux 10 | firefox +1 | 140.10.0-1.el10_1 | RLSA-2026:12285, RLSA-2026:10767 |
| Rocky Linux 9 | firefox +1 | 140.10.0-1.el9_7 | RLSA-2026:19348, RLSA-2026:19201, RLSA-2026:15892 |
| Rocky Linux 8 | firefox +1 | 140.10.0-1.el8_10 | RLSA-2026:13537, RLSA-2026:10766 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | MozillaFirefox | 150.0-1.1 | openSUSE-SU-2026:10626-1 |
| openSUSE Tumbleweed | MozillaThunderbird | 140.9.1-1.1 | openSUSE-SU-2026:10610-1 |
| openSUSE Tumbleweed | firefox-esr | 153.0-1.1 | openSUSE-SU-2026:11373-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | firefox | 140.10.1-1.amzn2023.0.1 | ALAS2023-2026-1652 |
| Amazon Linux 2 | thunderbird | 140.10.0-1.amzn2.0.1 | ALAS2-2026-3290 |
Oracle Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Oracle Linux 10 | firefox +1 | 140.10.0-1.0.1.el10_1 | ELSA-2026-19131, ELSA-2026-19041, ELSA-2026-12285 |
| Oracle Linux 9 | firefox +2 | 140.10.0-1.0.1.el9_7 | ELSA-2026-19348, ELSA-2026-19201, ELSA-2026-15892 |
| Oracle Linux 8 | firefox +1 | 140.10.0-1.0.1.el8_10 | ELSA-2026-13537, ELSA-2026-10766 |
| Oracle Linux 7 | firefox | 140.10.0-1.0.1.el7_9 | ELSA-2026-19704 |
Wolfi
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Wolfi rolling | firefox | 140.10-r0 | — |
Advisories 50
- WID-SEC-2026-1228 Mozilla Thunderbird, Firefox ESR und Firefox: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- WID-SEC-2026-2455 Oracle Solaris Drittanbieterkomponenten: Mehrere Schwachstellen BSI CERT-Bund (WID) · Nov 12, 2026
- ALSA-2026:19348 Important: thunderbird security update AlmaLinux Security Advisories · Nov 6, 2026
- ALSA-2026:10767 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:12285 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:10757 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:15892 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:10766 Important: firefox security update AlmaLinux Security Advisories · Oct 29, 2026
- ALSA-2026:13537 Important: thunderbird security update AlmaLinux Security Advisories · Oct 29, 2026
- RHSA-2026:19348 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 29, 2026
- openSUSE-SU-2026:11373-1 firefox-esr-153.0-1.1 on GA media SUSE / openSUSE Security Updates · Jul 26, 2026
- ELSA-2026-19131 Important: thunderbird security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 20, 2026
- WID-SEC-2026-1730 Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff BSI CERT-Bund (WID) · Jul 16, 2026
- RHSA-2026:19655 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19704 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19542 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19469 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19467 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19468 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19466 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19465 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19463 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19464 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19461 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19462 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19201 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19131 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:19041 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:17690 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:17688 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:17689 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:17687 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:17477 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:15892 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:13537 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:12285 Red Hat Security Advisory: thunderbird security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:10766 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:10767 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- RHSA-2026:10757 Red Hat Security Advisory: firefox security update Red Hat Security Advisories (RHSA) · Jul 15, 2026
- ELSA-2026-19041 Important: firefox security update (Oracle Linux 10) Oracle Linux Security Advisories (ELSA) · Jul 8, 2026
- ELSA-2026-19348 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 26, 2026
- ELSA-2026-19704 Important: firefox security update (Oracle Linux 7) Oracle Linux Security Advisories (ELSA) · Jun 15, 2026
- ELSA-2026-19201 Important: firefox security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · Jun 12, 2026
- RLSA-2026:19348 Important: thunderbird security update Rocky Linux Security Advisories · May 28, 2026
- RLSA-2026:19201 Important: firefox security update Rocky Linux Security Advisories · May 20, 2026
- ALAS2-2026-3290 Important: thunderbird security update (Amazon Linux 2) Amazon Linux Security Center (ALAS) · May 13, 2026
- ALAS2023-2026-1652 Important: firefox security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · May 13, 2026
- RLSA-2026:15892 Important: thunderbird security update Rocky Linux Security Advisories · May 13, 2026
- ELSA-2026-15892 Important: thunderbird security update (Oracle Linux 9) Oracle Linux Security Advisories (ELSA) · May 11, 2026
- RLSA-2026:12285 Important: thunderbird security update Rocky Linux Security Advisories · May 7, 2026