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Microsoft published Security Update Guide entries for two Chromium vulnerabilities affecting browser security boundaries and memory safety. The flaws are tracked as CVE-2026-5275, a heap buffer overflow in ANGLE, and CVE-2026-5881, a policy bypass in LocalNetworkAccess. ANGLE is a graphics translation layer used by Chromium-based browsers, making the memory-corruption issue notable because such bugs can increase the risk of browser compromise.
The second issue weakens enforcement of Chromium's LocalNetworkAccess protections, which are intended to restrict how web content reaches local network resources. Together, the advisories highlight separate but significant risks in Chromium components: one tied to potential memory corruption and the other to bypass of browser security policy controls. Microsoft did not provide additional public synopsis details in the referenced advisories.
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2 events from the most recent confirmed update back to the earliest known activity.
Microsoft added CVE-2026-5275, a Chromium ANGLE heap buffer overflow, to its Security Update Guide. No additional synopsis details were provided in the reference.
Microsoft added CVE-2026-5881, a Chromium LocalNetworkAccess policy bypass, to its Security Update Guide. No additional synopsis details were provided in the reference.
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Microsoft published Security Update Guide entries for a broad set of **Chromium** vulnerabilities affecting browser components including **WebRTC, ANGLE, Network, Navigation, Blink, Base, V8, Skia,** and **WebAudio**. The listed issues include multiple `use-after-free` bugs such as `CVE-2026-4445`, `CVE-2026-4454`, `CVE-2026-4449`, and `CVE-2026-4441`, as well as a `heap buffer overflow` in `ANGLE` (`CVE-2026-4448`), a `heap buffer overflow` in `WebAudio` (`CVE-2026-4443`), an `out-of-bounds read` in `Skia` (`CVE-2026-4460`), `insufficient validation of untrusted input` in `Navigation` (`CVE-2026-4451`), and an `inappropriate implementation` flaw in `V8` (`CVE-2026-4461`). The same set of advisories also included non-Chromium entries tied to lower-level platform components: `CVE-2026-4438` for `gethostbyaddr` and `gethostbyaddr_r` returning invalid DNS hostnames, `CVE-2025-71267` for an `ntfs3` infinite loop triggered by a zero-sized `ATTR_LIST`, and `CVE-2026-23233` for an `f2fs` fix to avoid mapping the wrong physical block for a swapfile. Together, the disclosures show Microsoft tracking both browser-engine memory-corruption risks and underlying filesystem and networking defects through its update pipeline.
Jun 29, 2026
Microsoft published security advisories for several **Chromium** vulnerabilities spanning browser components including **WebXR**, **WebRTC**, **V8**, and web apps. The issues are tracked as `CVE-2026-8583` (**insufficient policy enforcement in WebXR**), `CVE-2023-7024` (**heap buffer overflow in WebRTC**), `CVE-2022-1096` (**type confusion in V8**), and `CVE-2021-4052` (**use-after-free in web apps**), indicating exposure across both rendering and scripting-related functionality in Chromium-based environments. The listed flaws cover multiple high-risk bug classes commonly associated with browser compromise, including memory corruption and policy enforcement weaknesses. Microsoft surfaced the vulnerabilities through its Security Update Guide and portal advisories, signaling that organizations using Microsoft products that incorporate Chromium components should review applicable updates and assess browser-related attack surface tied to immersive web features, real-time communications, JavaScript execution, and web application handling.
Jul 12, 2026
Microsoft added **CVE-2026-9120** to its Security Update Guide as a **Chromium** flaw caused by a **use-after-free in WebRTC**, extending a pattern of browser-component memory-safety issues that have repeatedly affected Microsoft products built on Chromium. Related Microsoft advisories previously tracked similar upstream Chromium bugs including **CVE-2022-2294** (**heap buffer overflow in WebRTC**), **CVE-2022-2008** (**out-of-bounds memory access in WebGL**), **CVE-2021-4066** (**integer underflow in ANGLE**), and **CVE-2025-5419** (**out-of-bounds read/write in V8**). The broader set of Microsoft Security Update Guide entries also shows the company continuing to catalog third-party and legacy-component vulnerabilities that can lead to severe impact, including **OpenSSL CVE-2022-3602** affecting X.509 certificate verification and older **Jet Database Engine remote code execution** flaws such as **CVE-2019-0577**, **CVE-2019-0579**, and **CVE-2020-0995**. Together, the advisories highlight Microsoft's ongoing publication of high-risk memory-corruption and code-execution issues across browser, cryptographic, and database components that defenders should track for patching and exposure assessment.
Jul 12, 2026