Vulnerability · Published Sep 15, 2026 · Assigned by Delinea
CVE-2026-15639Reflected Cross-Site Scripting
Critical 9.3
In plain English
A critical-severity cross-site scripting in Secret Server (On-Prem) from Delinea. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 39% of all known vulnerabilities).
Severity (CVSS 4.0)9.3Critical
Exploit odds (30 days)0.4%top 61.3% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
An attacker can craft a malicious link that, if used by a legitimate user, may cause the user's browser to run JavaScript supplied by the attacker.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Delinea | Secret Server (On-Prem) | 10.2.19 – through 11.9.48 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H
References
- https://delinea.com/security-advisories vendor-advisory