Quick answers
- Is CVE-2026-58289 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-58289 being exploited in the wild.
- How severe is CVE-2026-58289?
- Critical severity, with a CVSS score of 9, published 3 July 2026.
- Which products and versions are affected?
- Microsoft Edge (Chromium-based) 1.0.0.0 to 150.0.4078.47.
- Is there a fix for CVE-2026-58289?
- 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-2026-58289 attacked?
- It is attacked over the network, in a network appliance.
- Am I affected by CVE-2026-58289?
- 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) prior to version 150.0.4078.48. The flaw occurs when the browser accesses a resource using an incompatible type, which can be leveraged by a remote, unauthenticated attacker to execute arbitrary code. While the attack vector is network-based, the CVSS score reflects a high attack complexity, suggesting specific conditions or configurations may be required for successful exploitation. The vulnerability has a high impact on confidentiality, integrity, and availability, and it allows for scope traversal. Users are advised to update to version 150.0.4078.48 or later to mitigate this risk.
Affected products
- Microsoft Edge (Chromium-based) 1.0.0.0 to 150.0.4078.47
Timeline
- 2026-07-03: disclosed
- 2026-07-03: advisory