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CVE-2026-15639— Reflected Cross-Site Scripting

Quick assessment

Affected
Delinea Secret Server (On-Prem)
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

攻击者可以构造一个恶意链接，若合法用户点击该链接，可能导致其浏览器执行攻击者提供的 JavaScript 代码。

CVSS 9.3 · Critical

Possible ATT&CK Techniques 1 AI

T1059.007 · JavaScript
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I. Basic Information for CVE-2026-15639

Vulnerability Information
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Vulnerability Title
Reflected Cross-Site Scripting
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Delinea Secret Server (On-Prem) 10.2.19 ~ 11.9.48 -

II. Public POCs for CVE-2026-15639

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III. Intelligence Information for CVE-2026-15639

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Vendor Advisories for CVE-2026-15639 (1)

Same Patch Batch · Delinea · 2026-09-15 · 3 CVEs total

CVE-2026-15640 9.5 CRITICAL Authentication Bypass via SAML Response Manipulation
CVE-2026-15638 9.1 CRITICAL Cryptographic Padding Oracle

IV. Related Vulnerabilities

Same product: Secret Server (On-Prem)
Same vendor: Delinea
Same weakness: CWE-79

V. Comments for CVE-2026-15639

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