An update for firefox is now available for openEuler-24.03-LTS-SP1 Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-3789 Final 1.0 1.0 2026-09-14 Initial 2026-09-14 2026-09-14 openEuler SA Tool V1.0 2026-09-14 firefox security update An update for firefox is now available for openEuler-24.03-LTS-SP1 Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo Security Fix(es): Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153.(CVE-2026-16365) Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154.(CVE-2026-75874) Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84119) Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84120) Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84121) Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84122) Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84124) Privilege escalation due to invalid pointer in the Graphics component of Mozilla Firefox. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84131) Internally found bugs present in Firefox 154, Firefox ESR 153.1 and Firefox ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84143) Internally found bugs present in Firefox 154, Firefox ESR 153.1, Firefox ESR 140.14 and Firefox ESR 115.39. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2.(CVE-2026-84145) An update for firefox is now available for master/openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP4/openEuler-24.03-LTS-Next/openEuler-24.03-LTS-SP1/openEuler-24.03-LTS-SP3/openEuler-24.03-LTS-SP4. openEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Critical firefox https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-16365 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-75874 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84119 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84120 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84121 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84122 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84124 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84131 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84143 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-84145 https://nvd.nist.gov/vuln/detail/CVE-2026-16365 https://nvd.nist.gov/vuln/detail/CVE-2026-75874 https://nvd.nist.gov/vuln/detail/CVE-2026-84119 https://nvd.nist.gov/vuln/detail/CVE-2026-84120 https://nvd.nist.gov/vuln/detail/CVE-2026-84121 https://nvd.nist.gov/vuln/detail/CVE-2026-84122 https://nvd.nist.gov/vuln/detail/CVE-2026-84124 https://nvd.nist.gov/vuln/detail/CVE-2026-84131 https://nvd.nist.gov/vuln/detail/CVE-2026-84143 https://nvd.nist.gov/vuln/detail/CVE-2026-84145 openEuler-24.03-LTS-SP1 firefox-140.15.0-1.oe2403sp1.aarch64.rpm firefox-debuginfo-140.15.0-1.oe2403sp1.aarch64.rpm firefox-debugsource-140.15.0-1.oe2403sp1.aarch64.rpm firefox-140.15.0-1.oe2403sp1.src.rpm firefox-140.15.0-1.oe2403sp1.x86_64.rpm firefox-debuginfo-140.15.0-1.oe2403sp1.x86_64.rpm firefox-debugsource-140.15.0-1.oe2403sp1.x86_64.rpm Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 153. 2026-09-14 CVE-2026-16365 openEuler-24.03-LTS-SP1 High 8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Sandbox escape in the Remote Settings Client component. This vulnerability was fixed in Firefox 154 and Thunderbird 154. 2026-09-14 CVE-2026-75874 openEuler-24.03-LTS-SP1 Critical 10.0 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Sandbox escape due to use-after-free in the DOM: Navigation component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84119 openEuler-24.03-LTS-SP1 Critical 9.6 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84120 openEuler-24.03-LTS-SP1 Medium 5.4 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Sandbox escape due to use-after-free in the DOM: Security component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84121 openEuler-24.03-LTS-SP1 Critical 9.6 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Use-after-free in the Audio/Video component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84122 openEuler-24.03-LTS-SP1 Medium 5.4 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84124 openEuler-24.03-LTS-SP1 Medium 5.4 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Privilege escalation due to invalid pointer in the Graphics component of Mozilla Firefox. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84131 openEuler-24.03-LTS-SP1 High 8.8 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Internally found bugs present in Firefox 154, Firefox ESR 153.1 and Firefox ESR 140.14. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84143 openEuler-24.03-LTS-SP1 Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789 Internally found bugs present in Firefox 154, Firefox ESR 153.1, Firefox ESR 140.14 and Firefox ESR 115.39. Some of these bugs showed evidence of memory corruption or another security-relevant defect and we presume that with enough effort some of these could have been exploited. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, and Firefox ESR 153.2. 2026-09-14 CVE-2026-84145 openEuler-24.03-LTS-SP1 High 7.5 AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H firefox security update 2026-09-14 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-3789