Quick answers
- Is CVE-2026-69438 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69438 being exploited in the wild.
- How severe is CVE-2026-69438?
- High severity, with a CVSS score of 8.1, published 8 September 2026.
- Which products and versions are affected?
- Microsoft JScript.
- Is there a fix for CVE-2026-69438?
- 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-2026-69438 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-69438?
- Check whether you run Microsoft JScript. 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
The vulnerability stems from incorrect handling of numeric type conversions in Microsoft JScript. The flaw allows an attacker to trigger arbitrary code execution through network-based attack vectors without requiring authentication. The attack vector is network-accessible, meaning remote exploitation is possible. Microsoft has released security updates to correct the type conversion logic and prevent exploitation.
Affected products
- Microsoft JScript
Timeline
- 2026-09-08: disclosed