Quick answers
- Is CVE-2026-15640 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-15640 being exploited in the wild.
- How severe is CVE-2026-15640?
- Informational severity, published 16 September 2026.
- Which products and versions are affected?
- Delinea Secret Server.
- Is there a fix for CVE-2026-15640?
- 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-2026-15640 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-15640?
- Check whether you run Delinea Secret Server. 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 vulnerability is an authentication bypass in Secret Server's SAML identity provider integration. The root cause is insufficient validation of SAML IdP responses, allowing an attacker to craft or intercept a valid SAML response and modify user identity claims to impersonate another user. Attack preconditions likely include network access to Secret Server and ability to influence or intercept SAML authentication flows (e.g., via network position or compromised IdP). Successful exploitation grants full access to the impersonated user's privileges and all accessible secrets within the vault. A patch is expected from Delinea; users should monitor their security advisories and apply updates promptly.
Affected products
- Delinea Secret Server
Timeline
- 2026-09-16: disclosed