EUVD-2026-29714
GHSA-f8cw-8gm3-gpm3
Severity by source
AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Network-delivered injection with mandatory user interaction; privilege escalation is limited in scope and impact with no availability effect, matching PR:N and S:U.
Primary rating from NVD.
CVSS VectorNVD
Lifecycle Timeline
2DescriptionCVE.org
Improper neutralization of special elements in output used by a downstream component ('injection') in Microsoft Edge (Chromium-based) allows an unauthorized attacker to elevate privileges over a network.
AnalysisAI
Privilege escalation via injection (CWE-74) in Microsoft Edge (Chromium-based) versions prior to 148.0.3967.55 allows an unauthenticated remote attacker to elevate privileges within the browser context through specially crafted content requiring user interaction. The attack is network-delivered at low complexity but carries only limited confidentiality and integrity impact (C:L/I:L), with scope remaining unchanged. No active exploitation is evidenced - EPSS sits at 0.04% (13th percentile) and SSVC reports exploitation status of none with non-automatable delivery.
Technical ContextAI
CWE-74 (Injection - Improper Neutralization of Special Elements in Output Used by a Downstream Component) describes a class of vulnerabilities where attacker-controlled input is incorporated into output consumed by a downstream browser subsystem without adequate sanitization or encoding. In a Chromium-based browser like Edge, this typically manifests in rendering pipelines, script environments, or internal IPC mechanisms where untrusted content is forwarded to a privileged component. The affected scope per CPE is cpe:2.3:a:microsoft:microsoft_edge_(chromium-based):*:*:*:*:*:*:*:*, covering all builds from 1.0.0.0 through 148.0.3967.54. The 'Authentication Bypass' tag in threat intelligence likely describes the privilege escalation mechanism - injected content bypassing internal access controls rather than a standalone credential bypass.
RemediationAI
Upgrade Microsoft Edge (Chromium-based) to version 148.0.3967.55 or later, as confirmed by Microsoft MSRC advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42838. Edge performs automatic background updates for consumer installs, but enterprise administrators using Microsoft Edge for Business or group-policy-managed deployments should verify the installed version via edge://version and force update through the Edge Update service or an endpoint management tool (e.g., Intune, SCCM). As a compensating control while patching is pending, disabling automatic navigation to untrusted external URLs or leveraging Microsoft Defender SmartScreen to block known-malicious pages can reduce user exposure, though neither eliminates the underlying flaw. No workaround fully substitutes for the vendor patch.
Security-feature bypass in Microsoft Edge (Chromium-based) versions prior to 150.0.4078.48 lets a remote, unauthenticate
Remote code execution in Microsoft Edge (Chromium-based) before 151.0.4129.59 allows a network attacker to run arbitrary
Remote code execution via buffer over-read in Microsoft Edge (Chromium-based) versions prior to 151.0.4129.59 affects au
Remote code execution in Microsoft Edge (Chromium-based) prior to version 151.0.4129.59 is achievable by an unauthentica
Remote code execution in Microsoft Edge (Chromium-based) stems from a use-after-free memory corruption flaw (CWE-416) th
Remote code execution in Microsoft Edge (Chromium-based) allows an unauthenticated attacker to run arbitrary code by lur
Remote code execution in Microsoft Edge (Chromium-based) stems from a heap-based buffer overflow (CWE-122) that a networ
Remote code execution in Microsoft Edge (Chromium-based) is enabled by a type confusion vulnerability (CWE-843) that can
Remote code execution in Microsoft Edge (Chromium-based) before version 150.0.4078.48 allows an unauthenticated remote a
Remote code execution in Microsoft Edge (Chromium-based) stems from a use-after-free (CWE-416) memory-corruption flaw th
Remote code execution in Microsoft Edge (Chromium-based) lets an unauthenticated network attacker run arbitrary code by
Remote code execution in Microsoft Edge (Chromium-based) before 150.0.4078.48 allows an unauthenticated attacker to run
Same technique Authentication Bypass
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External POC / Exploit Code
Leaving vuln.today