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Mozilla released Firefox 151.0.3 to address multiple security vulnerabilities that could lead to denial-of-service conditions, memory corruption, and arbitrary code execution on affected systems. The update was highlighted in an EG-FinCIRT security notice urging organizations to review and apply the patch after appropriate testing.
Among the issues cited is CVE-2026-10701, an incorrect boundary conditions flaw in the Graphics: Text component with a CVSS score of 7.5. The advisory also references CVE-2026-10702 and indicates that enterprises should prioritize deployment of the updated browser version to reduce exposure to exploitation.
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Mozilla released Firefox version 151.0.3 to remediate multiple security vulnerabilities, including CVE-2026-10701 and CVE-2026-10702. The flaws could enable denial-of-service, memory corruption, and arbitrary code execution on affected systems.
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Mozilla disclosed two high-severity Firefox vulnerabilities affecting graphics-related code and released fixes in **Firefox 149.0.2**. **CVE-2026-5733** impacts the **Graphics: WebGPU** component and is described as incorrect boundary conditions under `CWE-119`, while **CVE-2026-5732** affects the **Graphics: Text** component and involves an integer overflow caused by incorrect boundary conditions under `CWE-190`. Both flaws carry a **CVSS v3.1** score vector of `AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H`, indicating that remote exploitation with user interaction could have severe effects on confidentiality, integrity, and availability. Mozilla said **CVE-2026-5732** affects Firefox versions earlier than **149.0.2** and **Firefox ESR** versions earlier than **140.9.1**, while **CVE-2026-5733** affects Firefox versions earlier than **149.0.2**; the company linked the disclosures to Bugzilla entries and security advisories documenting the issues and available patches.
Jun 29, 2026
Mozilla released **Firefox 152** for desktop and web platforms alongside **Firefox ESR 140.12.0** and **115.37.0**, delivering browser, developer, and mobile updates that include experimental **JPEG XL** support in Firefox Labs, changes to the Notifications and Pointer Lock APIs, `CSS field-sizing`, PDF handling improvements, and new Android features such as AI-assisted tab grouping and enhanced link-sharing options. The release also fixes **77 security vulnerabilities**, with Mozilla stating that **60** were memory-safety bugs and that some could potentially be exploited for **arbitrary code execution** when processing specially crafted content. The patched issues include groups tracked as **`CVE-2026-12328`**, **`CVE-2026-12327`**, and **`CVE-2026-12326`**, making the update a significant security release for both standard and ESR Firefox users.
Jul 12, 2026
Mozilla released security updates for **Firefox 154**, supported **Firefox ESR** branches, and **Thunderbird** to fix a broad set of vulnerabilities affecting desktop and mobile users. Government and vendor advisories said the updates address **3 critical** and **17 high-severity** flaws involving arbitrary code execution, privilege escalation, security restriction bypass, sandbox escape, site isolation failures, use-after-free conditions, and information disclosure. Firefox 154 also introduced product changes including expanded Local Access Network protections for WebSocket connections, while security notices from Canada and Italy urged organizations to review Mozilla bulletins and update affected installations. Tenable and downstream Linux advisories flagged the issue set as **critical** across Windows, macOS, and Slackware packages, with affected versions including Firefox releases prior to 154, multiple ESR builds before their patched versions, and Thunderbird releases prior to **140.14** or **154.0** depending on branch. Nessus coverage tied the fixes to numerous CVEs, including **`CVE-2026-74990`** as a scoring reference in several advisories, and highlighted specific Thunderbird issues such as a Remote Settings Client sandbox escape, a CanvasWebGL site isolation flaw, a DOM: Networking privilege escalation bug, and WebAssembly and garbage-collection use-after-free vulnerabilities. The recommended action across all notices was to upgrade Mozilla products to the latest patched versions immediately.
Aug 26, 2026