---
id: CVE-2026-15640
title: >-
  Under certain conditions a valid SAML IdP response may be used to impersonate
  another Secret Server user.
summary: >-
  Under certain conditions a valid SAML IdP response may be used to impersonate
  another Secret Server user.
severity: critical
cvss: 9.5
cvssVector: 'CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:H/SI:H/SA:H'
cwe:
  - CWE-290
vendor: Delinea
product: Secret Server (On-Prem)
affected:
  - secret_server_on-prem >= 10.5.0 <= 12.1.3
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T19:34:36.657'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15640'
references:
  - url: 'https://delinea.com/security-advisories'
    label: 1443cd92-d354-46d2-9290-d812316ca43a
tags:
  - nvd
  - cve.org
epss: 0.00278
epssPercentile: 0.20448
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-16T19:37:32.364446Z'
cvssSource: cna
ingestedAt: '2026-09-15T23:46:25.571Z'
---

## Overview

Under certain conditions a valid SAML IdP response may be used to impersonate another Secret Server user.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.