Quick answers
- Is CVE-2026-3457 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-3457 being exploited in the wild.
- How severe is CVE-2026-3457?
- Medium severity, with a CVSS score of 6.8, published 27 March 2026.
- Which products and versions are affected?
- Thales Sentinel LDK Runtime before 10.22.
- Is there a fix for CVE-2026-3457?
- 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-2026-3457 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-3457?
- Check whether you run Thales Sentinel LDK Runtime 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
This is a stored XSS vulnerability (CWE-79) caused by improper neutralization of user input during web page generation in Thales Sentinel LDK Runtime on Windows. The vulnerability allows an attacker to inject malicious scripts that are persisted in the application and executed in the browsers of other users who access the affected pages. No authentication or user interaction beyond normal browsing is required to exploit the stored payload. An attacker can achieve arbitrary JavaScript execution in users' browsers, enabling session hijacking, credential harvesting, or client-side malware delivery. The vulnerability affects versions before 10.22, which is expected to contain the fix.
Affected products
- Thales Sentinel LDK Runtime before 10.22
Timeline
- 2026-03-27: disclosed