Summary
Impact: Information Disclosure. Microsoft rating: Moderate. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What type of information could be disclosed by this vulnerability?
An attacker who successfully exploited this vulnerability could potentially read small portions of heap memory.
Security updates
156.0.4314.42 — https://docs.microsoft.com/en-us/DeployEdge/microsoft-edge-relnotes-security
Vulnerabilities 1
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Medium 6.5
Microsoft Edge (Chromium-based) Information Disclosure Vulnerability
Out-of-bounds read in Microsoft Edge (Chromium-based) allows an unauthorized attacker to disclose information over a network.
Revision history
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#1
Information published.
References
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CVE-2026-122518 Microsoft Edge (Chromium-based) Information Disclosure Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-122518
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss