CVSS: 8.1EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0891 – Memory safety bugs fixed in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147
https://notcve.org/view.php?id=CVE-2026-0891
13 Jan 2026 — Memory safety bugs present in Firefox ESR 140.6, Thunderbird ESR 140.6, Firefox 146 and Thunderbird 146. 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 affects Firefox < 147 and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1964722%2C2000981%2C2003100%2C2003278 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •
CVSS: 6.5EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0890 – Spoofing issue in the DOM: Copy & Paste and Drag & Drop component
https://notcve.org/view.php?id=CVE-2026-0890
13 Jan 2026 — Spoofing issue in the DOM: Copy & Paste and Drag & Drop component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=2005081 • CWE-290: Authentication Bypass by Spoofing •
CVSS: 5.3EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0887 – Clickjacking issue, information disclosure in the PDF Viewer component
https://notcve.org/view.php?id=CVE-2026-0887
13 Jan 2026 — Clickjacking issue, information disclosure in the PDF Viewer component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=2006500 • CWE-497: Exposure of Sensitive System Information to an Unauthorized Control Sphere •
CVSS: 5.3EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0886 – Incorrect boundary conditions in the Graphics component
https://notcve.org/view.php?id=CVE-2026-0886
13 Jan 2026 — Incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=2005658 • CWE-501: Trust Boundary Violation •
CVSS: 6.5EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0885 – Use-after-free in the JavaScript: GC component
https://notcve.org/view.php?id=CVE-2026-0885
13 Jan 2026 — Use-after-free in the JavaScript: GC component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=2003607 • CWE-416: Use After Free •
CVSS: 10.0EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0884 – Use-after-free in the JavaScript Engine component
https://notcve.org/view.php?id=CVE-2026-0884
13 Jan 2026 — Use-after-free in the JavaScript Engine component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=2003588 • CWE-416: Use After Free •
CVSS: 5.3EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0883 – Information disclosure in the Networking component
https://notcve.org/view.php?id=CVE-2026-0883
13 Jan 2026 — Information disclosure in the Networking component. This vulnerability affects Firefox < 147 and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=1989340 • CWE-200: Exposure of Sensitive Information to an Unauthorized Actor •
CVSS: 10.0EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0882 – Use-after-free in the IPC component
https://notcve.org/view.php?id=CVE-2026-0882
13 Jan 2026 — Use-after-free in the IPC component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=1924125 • CWE-416: Use After Free •
CVSS: 10.0EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0880 – Sandbox escape due to integer overflow in the Graphics component
https://notcve.org/view.php?id=CVE-2026-0880
13 Jan 2026 — Sandbox escape due to integer overflow in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=2005014 • CWE-190: Integer Overflow or Wraparound •
CVSS: 10.0EPSS: 0%CPEs: 10EXPL: 0CVE-2026-0879 – Sandbox escape due to incorrect boundary conditions in the Graphics component
https://notcve.org/view.php?id=CVE-2026-0879
13 Jan 2026 — Sandbox escape due to incorrect boundary conditions in the Graphics component. This vulnerability affects Firefox < 147, Firefox ESR < 115.32, and Firefox ESR < 140.7. These are all security issues fixed in the firefox-esr-140.7.0-1.1 package on the GA media of openSUSE Tumbleweed. • https://bugzilla.mozilla.org/show_bug.cgi?id=2004602 • CWE-119: Improper Restriction of Operations within the Bounds of a Memory Buffer •