Quick answers
- Is CVE-2026-58295 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-58295 being exploited in the wild.
- How severe is CVE-2026-58295?
- High severity, with a CVSS score of 8.3, published 3 July 2026.
- Which products and versions are affected?
- Microsoft Edge (Chromium-based) 1.0.0.0 to 150.0.4078.48.
- Is there a fix for CVE-2026-58295?
- 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-2026-58295 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-58295?
- Check whether you run Microsoft Edge (Chromium-based) at an affected version. 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 type confusion vulnerability (CWE-843) exists in Microsoft Edge (Chromium-based) when accessing resources using an incompatible type. This flaw allows a remote, unauthenticated attacker to bypass security features via the network without any user interaction. According to the CVSS metrics, the vulnerability has a scope change, meaning it could impact components beyond the browser itself, potentially affecting confidentiality, integrity, and availability. Microsoft has addressed this in versions 150.0.4078.48 and later.
Affected products
- Microsoft Edge (Chromium-based) 1.0.0.0 to 150.0.4078.48
Timeline
- 2026-07-03: disclosed: Initial publication of the CVE record.
- 2026-07-03: advisory: Microsoft released the security advisory and update guide.