---
id: "CVE-2026-96187"
kind: "vulnerability"
aliases: ["CVE-2026-96187"]
title: "Microsoft Edge: type confusion lets a remote attacker read information"
severity: "high"
cvss: 7.4
epss: null
exploited: false
status: "open"
category: "other"
products: [{"name": "Microsoft Edge (Chromium-based)", "fixed": ["155.0.4283.45"], "affected": "< 155.0.4283.45", "ecosystem": "vendor"}]
ecosystems: []
tags: ["browser", "chromium", "edge", "other", "windows"]
not_affected_if: ["patched-build"]
published_at: "2026-10-29T16:20:08+00:00"
first_seen_at: "2026-10-29T16:26:03+00:00"
updated_at: "2026-10-29T16:34:55+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-96187", "first_seen_at": "2026-10-29T16:26:03+00:00"}, {"source": "analyst", "url": null, "first_seen_at": "2026-10-29T16:34:55+00:00"}]
---

# Microsoft Edge: type confusion lets a remote attacker read information

A type confusion flaw in Microsoft Edge (Chromium-based) lets an unauthorized attacker access resources with an incompatible type. The result is information disclosure over the network.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft Edge (Chromium-based) affected < 155.0.4283.45 fixed 155.0.4283.45

## How to check

Open edge://settings/help (Settings > About Microsoft Edge) and compare the version to 155.0.4283.45; anything lower on the 155 line, or any version before 155, is vulnerable. Enterprises: check the installed msedge.exe version across fleet.

## Fix

Update Microsoft Edge (Chromium-based) to 155.0.4283.45 or later (current Stable 156.0.4314.42 per release notes of Oct 22, 2026).

## Timeline

- 2026-10-29T16:26:03+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-96187
- 2026-10-29T16:34:55+00:00 analyst — Read MSRC advisory: fixed build 155.0.4283.45 (Edge Stable), not exploited, not publicly disclosed, UI required, memory read with possible sandbox escape. No fix_status none; fix exists. Release-note page shows later builds (155.0.4283.62, 156.0.4314.42) too; its Oct 27 entry says Microsoft is working on a further Chromium fix, so newest build is safest. No X/discussion searched (routine B).

## Documents

- [advisory] MSRC: CVE-2026-96187 Edge (Chromium-based) Information Disclosure https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96187
- [fix] Microsoft Edge security release notes https://learn.microsoft.com/en-us/deployedge/microsoft-edge-relnotes-security

## From the sources

Access of resource using incompatible type ('type confusion') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_