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Microsoft Edge (Chromium-based) Security Feature Bypass Vulnerability
CVE-2026-57983 is an improper authorization vulnerability in Microsoft Edge (Chromium-based) that can allow an unauthorized attacker to bypass a security feature over a network. The issue is classified as a security feature bypass and indicates that Edge does not correctly enforce an authorization boundary in at least one code path or protected operation. Publicly available information does not identify the specific vulnerable function, component, or feature gate involved. The affected product is Microsoft Edge (Chromium-based) prior to version 150.0.4078.48.
What it means and what to do now: patch path, interim mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
Successful exploitation can allow an attacker to bypass an intended security control or authorization restriction in Microsoft Edge (Chromium-based). This may let an unauthenticated attacker circumvent expected access limitations and potentially affect resources or operations beyond the vulnerable component's intended security scope. Available information does not establish direct arbitrary code execution from this vulnerability alone, but it can weaken browser-enforced protections and reduce the effectiveness of security boundaries.
If you can’t patch tonight, do this now.
If immediate patching is not possible, reduce exposure by limiting use of untrusted web content, enforcing rapid browser update policies, and applying vendor security guidance for Microsoft Edge hardening until the fixed version can be deployed. No vulnerability-specific workaround is currently available in the provided information.
Patch, then assume compromise.
Update Microsoft Edge (Chromium-based) to version 150.0.4078.48 or later and apply the vendor-provided security updates that address CVE-2026-57983.
No public exploits tracked yet. Mallory keeps watching.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.