CVE-2026-2774

CVE-2026-2774 is an integer overflow in the Firefox Audio/Video component. Public sources indicate Firefox/ESR updates (Firefox 148, ESR 115.33, ESR 140.8) fix the flaw; affected products include Firefox and Thunderbird per accompanying advisories. The issue is rated high/critical by CVSS sources...

CVE-2026-2778

CVE-2026-2778: Sandbox escape due to incorrect boundary conditions in the DOM: Core & HTML component. Affected: Firefox (pre-148), Firefox ESR (pre-115.33/140.8); Thunderbird (pre-148, pre-140.8). Fixes: Firefox 148, ESR 115.33/140.8; Thunderbird 148/140.8. Practical impact: sandbox escape potent...

CVE-2026-2779

CVE-2026-2779 covers incorrect boundary conditions in Networking: JAR within Firefox (and Firefox ESR). Public advisories indicate the issue affects Firefox before version 148 and Firefox ESR before 140.8, with Firefox 148/ESR 140.8 and Thunderbird updates mitigating it. The connected Amazon Linu...

CVE-2026-4710

CVE-2026-4710 is an Audio/Video boundary-conditions flaw that affects Firefox (including ESR) and Thunderbird. The issue’s root cause is incorrect boundary handling in the Audio/Video component. Public advisories list the impact as high/critical, with CVSS 3.1 base score 9.8 (Impact: Confidential...

CVE-2026-16357

CVE-2026-16357 is a Mozilla Firefox/Firefox ESR vulnerability caused by incorrect boundary conditions in the Graphics component. Affected product: Firefox and Firefox ESR. The issue is tracked with a CVSS 3.1 base score of 9.8 (CRITICAL) with network attack vector, no user interaction, and possib...

CVE-2026-2782

CVE-2026-2782 affects Firefox (Netmonitor component) and is fixed in Firefox 148 and Firefox ESR 140.8, also addressed in Thunderbird 148/140.8. The connected sources corroborate privilege-escalation via Netmonitor across Mozilla products and note remediation as upgrading to Firefox 148+/Thunderb...

CVE-2026-2792

CVE-2026-2792 involves memory safety bugs found in Firefox ESR 140.7, Thunderbird ESR 140.7, Firefox 147 and Thunderbird 147. Some flaws showed memory corruption indicators and could potentially be exploited to run arbitrary code; Mozilla fixed these in Firefox 148, Firefox ESR 140.8, Thunderbird...

CVE-2026-6774

CVE-2026-6774 is a mitigation bypass in the DOM: Security component that affects Firefox and Thunderbird. The issue is described as a bypass of mitigation in the DOM security stack and was fixed in Firefox 150 and Thunderbird 150. The provided metadata indicates a CVSS v3.1 base score of 5.4 (Med...

CVE-2026-8950

CVE-2026-8950 is a reported same-origin policy bypass in the Networking: HTTP component, with root cause not explicitly detailed in the provided documents. Affected software includes Firefox (fixed in version 151) and Firefox ESR (140.11), as well as Thunderbird (fixed in 151 and 140.11). The CVS...

CVE-2026-0878

CVE-2026-0878 describes a sandbox escape caused by incorrect boundary conditions in the Graphics: CanvasWebGL component. Affected: Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, Thunderbird

CVE-2026-2780

CVE-2026-2780: Privilege escalation in the Netmonitor component of Firefox/Thunderbird. The vulnerability is fixed in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Affected products include Firefox family and Thunderbird; root cause is in the Netmonitor component. Remedi...

CVE-2026-6782

This CVE (CVE-2026-6782) affects the IP Protection component and is addressed by upgrading Firefox to version 150 and Thunderbird to version 150 (per multiple advisories). Public records in Fedora/Nessus notes indicate an information disclosure vulnerability resolved by these upgrades; no detaile...

CVE-2026-74936

A use-after-free in the JavaScript: WebAssembly component of Firefox/Thunderbird can lead to memory corruption and arbitrary code execution. CVSS 9.8 (network, no auth required). Fixed in Firefox 154, ESR 140.14, ESR 153.1, Thunderbird 154, 140.14, and 153.1; Debian and Slackware packages updated...

CVE-2026-74940

CVE-2026-74940 is a use-after-free vulnerability in the Graphics: Text component of Mozilla Firefox and Thunderbird . It carries a CVSS 3.1 score of 9.8 (Critical) with a network attack vector requiring no privileges or user interaction. The Debian advisory notes that the vulnerability could pote...

CVE-2026-74949

CVE-2026-74949 is a privilege escalation vulnerability in Mozilla Firefox and Thunderbird caused by a use-after-free in the Graphics: Canvas2D component. The CVSS 3.1 score is 8.8 (HIGH) , with a network attack vector requiring user interaction but no privileges. Successful exploitation could lea...

CVE-2026-8974

CVE-2026-8974 concerns memory-safety bugs in Thunderbird 140.10 and Thunderbird 150 that could enable arbitrary code execution; fixes are available in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. Multiple vendor advisories (e.g., openSUSE SUSE 10813-1, Slackware advis...

CVE-2026-0884

CVE-2026-0884 is a use-after-free in the JavaScript Engine component. Affected products include Firefox (versions before 147 and ESR before 140.7) and Thunderbird (versions before 147 and ESR before 140.7). The issue is confirmed in multiple security advisories and Debian/Distro records. Remediat...

CVE-2026-16372

CVE-2026-16372 — Privilege escalation in the DOM: Content Processes component. Affected products: Firefox and Thunderbird. The provided documents do not reveal the exact root cause or vulnerable files. CVSS 3.1 base score 8.8 (HIGH) with Network access, no privileges required, user interaction ne...

CVE-2026-2766

CVE-2026-2766 is a use-after-free in the JavaScript Engine: JIT component of Firefox/Firefox ESR that was fixed in Firefox 148, ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Affected products in the provided documents include Firefox-based browsers and Thunderbird; multiple advisories (Astra...

CVE-2026-2767

CVE-2026-2767 is a use-after-free vulnerability in the JavaScript: WebAssembly component of Firefox/Thunderbird. Affected products include Firefox (Desktop) and Thunderbird with the WebAssembly implementation; the issue is addressed by fixes in Firefox 148, Firefox ESR 140.8, Thunderbird 148, and...

CVE-2026-4692

This CVE (CVE-2026-4692) is a confirmed issue in the Responsive Design Mode component, leading to sandbox escape. The primary affected product is Mozilla Firefox (and related ESR builds) with versions prior to the fixed releases: Firefox 149, Firefox ESR 115.34, and Firefox ESR 140.9; Thunderbird...

CVE-2026-74941

Mozilla Firefox's CanvasWebGL graphics component allows privilege escalation. Fixed in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1. CVSS 8.8 (HIGH) with network attack vector requiring user interaction. No exploitation reported in the wild; users should update to the patched versions. ...

CVE-2026-74950

A privilege escalation flaw in the Downloads API component of Firefox and Thunderbird allows network-based attackers to gain elevated privileges with user interaction. Fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1; no exploitation evidence reported by CISA. Updat...

CVE-2026-12297

CVE-2026-12297 describes a sandbox escape caused by incorrect boundary conditions in Mozilla Firefox/Thunderbird networking code. Affects Firefox and Thunderbird components; underlying fault is boundary-condition handling in the Networking component that allowed escape from the sandbox. Impact pe...

CVE-2026-16392

CVE-2026-16392 concerns a JIT miscompilation in the JavaScript Engine: JIT component. Multiple connected advisories indicate this issue affects Firefox/Thunderbird releases prior to version 153 and has been fixed in Firefox 153 and Thunderbird 153. Public details in the provided documents specify...

CVE-2026-2775

CVE-2026-2775 is a mitigation bypass in the DOM: HTML Parser component. The initial description states a fix in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Connected sources (Astra Linux bulletin and Amazon Linux advisories) reiterate the same mitig...

CVE-2026-2799

CVE-2026-2799 is a use-after-free vulnerability in the DOM: Core & HTML components of Mozilla Firefox and Thunderbird. The issue, identified across multiple advisories, is resolved in Firefox 148 and Thunderbird 148. Public exploit activity is noted in connected sources. Affected products include...

CVE-2026-12313

CVE-2026-12313 affects Firefox and Thunderbird: Information disclosure and sandbox escape in the Security: Process Sandboxing component. The vulnerability is fixed in Firefox 152, Firefox ESR 140.12, Thunderbird 152, and Thunderbird 140.12 (per Mozilla advisories and downstream vendor trackers). ...

CVE-2026-16354

CVE-2026-16354 affects Mozilla Firefox when using the Graphics: ImageLib component, causing information disclosure. The vulnerability is addressed in Firefox 153 and Firefox ESR 115.38 and 140.13. Connected sources corroborate that this issue is resolved by these version fixes; no exploitation st...

CVE-2026-2760

CVE-2026-2760 is a Firefox/Thunderbird Firefox Graphics: WebRender sandbox escape caused by incorrect boundary conditions. Multiple public advisories confirm the issue and that it is fixed in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Affected comp...

CVE-2026-74954

A side-channel flaw in Firefox/Thunderbird's Storage: Cache API enables network-based information disclosure. Affected versions are fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. No public exploit or in-the-wild exploitation is reported. Users should upgrade to t...

CVE-2026-74978

CVE-2026-74978 is a clickjacking issue in the Firefox/Thunderbird Widget component. Affected versions include Firefox ESR 153.0 and Thunderbird 153/153.0; fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. CVSS 8.1 HIGH. No in-the-wild exploitation reported. Upgrade ...

CVE-2026-74986

A site isolation flaw in Firefox/Thunderbird's CSS Parsing and Computation component allows cross-origin data leakage. NVD rates it CVSS 9.1 (network, no auth). No active exploitation confirmed; patch in Firefox 154, ESR 153.1, Thunderbird 154, and 153.1. Update affected browsers immediately.

CVE-2026-8970

The CVE describes a privilege-escalation in the Firefox Security component. Concrete detail from sources: the flaw is fixed in Firefox 151 and Firefox ESR 140.11. Affected scope is stated only as the Security component; no deeper root cause, affected subcomponents, or explicit exploit paths are p...

CVE-2026-0885

CVE-2026-0885 is a use-after-free in Firefox/Thunderbird’s JavaScript: GC component. Affected: Firefox < 147, Firefox ESR < 140.7, Thunderbird < 147, Thunderbird

CVE-2026-16379

Technical details for CVE-2026-16379 are not provided in the supplied documents. The initial entry mentions privilege escalation in the DOM Content Processes component and fixes in Firefox/Thunderbird versions, but lacks root cause, affected products, or remediation specifics.

CVE-2026-74952

Mozilla Firefox's Application Update component is affected by a privilege escalation flaw rated CVSS 8.8 (HIGH), exploitable remotely with no privileges but requiring user interaction. The vulnerability allows full confidentiality, integrity, and availability impact. It is fixed in Firefox 154 , ...

CVE-2026-74957

CVE-2026-74957 is a mitigation bypass in the Safe Browsing component of Mozilla Firefox and Thunderbird. The CVSS 3.1 score is 8.1 (HIGH) with a vector of AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N, indicating that a remote attacker can exploit this with low complexity and user interaction to achieve hi...

CVE-2026-74985

Privilege escalation in the Enterprise Policies component of Firefox and Thunderbird allows an attacker with no privileges to gain elevated access. Affected products include Firefox (all versions below 154), Firefox ESR (below 153.1), Thunderbird (below 154), and Thunderbird ESR (below 153.1). Th...

CVE-2026-8958

This CVE affects the Firefox Security: Process Sandboxing component and related Thunderbird variants, causing information disclosure and sandbox escape. The NVD/NVDC and CVE records state fixes in Firefox 151 and Firefox ESR 140.11, and in Thunderbird 151 and 140.11, addressing the underlying san...

CVE-2026-12327

CVE-2026-12327 relates to memory safety bugs in Mozilla products: Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151, and Thunderbird 151. Some bugs showed evidence of memory corruption and could potentially be exploited to run arbitrary code. The issue was fixed in Firefox 152, Firefox ESR ...

CVE-2026-12328

CVE-2026-12328 pertains to memory safety bugs in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151, and Thunderbird 151. Some bugs showed memory corruption and could potentially be exploited to run arbitrary code. Remediations are available: Firefox 152, Firefox ESR 140....

CVE-2026-2777

CVE-2026-2777 is a privilege-escalation vulnerability in the Firefox/Thunderbird Messaging System component. The issue is fixed in Firefox 148, Firefox ESR 115.33/140.8, Thunderbird 148, and Thunderbird 140.8. Connected sources (Astra Linux, AWS advisories, Debian security notes) confirm the same...

CVE-2026-2787

CVE-2026-2787 is a use-after-free in the DOM: Window and Location component, with fixes in Firefox 148, Firefox ESR 115.33, Firefox ESR 140.8, Thunderbird 148, and Thunderbird 140.8. Connected sources corroborate the issue in Firefox-related components and list the affected products as Firefox/Th...

CVE-2026-74946

A privilege escalation flaw in Firefox/Thunderbird's Graphics: CanvasWebGL component stems from incorrect boundary conditions. CVSS 8.8 (HIGH) with no privileges required and user interaction needed. Patched in Firefox 154, ESR 115.39/140.14/153.1, and Thunderbird 154/140.14/153.1. No active expl...

CVE-2026-74970

A site isolation flaw in Mozilla's Graphics component affects Firefox and Thunderbird. The issue allows a remote, unauthenticated attacker to potentially access or modify data in other process contexts via a crafted web page. Fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbi...

CVE-2026-8956

The CVE-2026-8956 issue is an integer overflow in the Networking: JAR component. Affected products include Firefox (includes Firefox 151 and Firefox ESR 140.11) and Thunderbird (incl. Thunderbird 151 and Thunderbird 140.11). The root cause is an integer overflow within the JAR networking module, ...

CVE-2026-2762

CVE-2026-2762 is an integer overflow in the JavaScript: Standard Library component that affects Firefox (non-ESR) and related Mozilla products. The issue is confirmed fixed in Firefox 148 and Firefox ESR 140.8, as well as Thunderbird 148 and Thunderbird 140.8. Connected advisories (Astra Linux bu...

CVE-2026-2771

CVE-2026-2771 is an undefined-behavior vulnerability in the DOM: Core & HTML component of Mozilla Firefox/Thunderbird family that was fixed in Firefox 148, Firefox ESR 115.33 and 140.8, Thunderbird 148 and 140.8. The issue is reported across multiple advisories (Astra Linux bulletin and Amazon Li...

CVE-2026-5734

CVE-2026-5734 involves memory safety bugs in Mozilla products. Affected: Firefox ESR 140.9.0, Thunderbird ESR 140.9.0, Firefox 149.0.1, and Thunderbird 149.0.1. Some bugs show memory corruption and could potentially be exploited to run arbitrary code. The issue is addressed by fixes in Firefox 14...