Quick answers
- Is CVE-2026-83831 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-83831 being exploited in the wild.
- How severe is CVE-2026-83831?
- High severity, with a CVSS score of 8.8, published 27 October 2026.
- Which products and versions are affected?
- Microsoft Edge.
- Is there a fix for CVE-2026-83831?
- No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
- How is CVE-2026-83831 attacked?
- It is attacked over the network, in a web application.
- Am I affected by CVE-2026-83831?
- Check whether you run Microsoft Edge. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
Technical details
A double free vulnerability exists in Microsoft Edge's memory management, allowing an attacker to free the same memory region twice and gain control over program execution. The vulnerability is triggered through a network vector (malicious web content) without requiring authentication or special user privileges beyond visiting a compromised or attacker-controlled website. Successful exploitation results in arbitrary code execution with the privileges of the Edge browser process.
Affected products
- Microsoft Edge
Timeline
- 2026-10-27: disclosed