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Back to active CVEs
Critical · CVSS 9.5CVE-2026-15640

Authentication Bypass via SAML Response ManipulationCVE-2026-15640

Answer in brief

CVE-2026-15640 records a Critical severity (CVSS 9.5) vulnerability in Authentication Bypass via SAML Response Manipulation. The current sources do not mark it as known exploited. The current feed maps Delinea/Secret Server (On-Prem) (generic), Delinea/Secret Server (On-Prem) (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 15, 2026Updated Sep 18, 2026Source checked Oct 31, 2026First seen by HOL Sep 15, 2026Material review Sep 18, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.5
Exploitation
Not marked as known exploited
Affected software
2 mapped packages or products
Fix availability
Not reported

Why this deserves its current priority

CVSS is 9.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Delinea/Secret Server (On-Prem) (generic), Delinea/Secret Server (On-Prem) (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Delinea/Secret Server (On-Prem)generic>=10.5.0 <=12.1.3Not reported
Delinea/Secret Server (On-Prem)generic10.5.0Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Delinea/Secret Server (On-Prem), Delinea/Secret Server (On-Prem).
  2. 2Review the reported fix. Source-reported solution: Upgrade to secret server version 12.2.7 or later

Evidence timeline and material changes

  1. Published upstream

    Sep 15, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Sep 18, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Sep 15, 2026

Sources and claim methodology

  • Source referencedelinea.com
Upstream source description

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

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Unverified Sign in with Apple callback parameter can override verified ID token claimsAlso CWE-290
  • ActivityPub Undo handler can unfollow or remove reposts on behalf of other accountsAlso CWE-290

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-290
Source
CVE List V5
Source checked
Oct 31, 2026
References
1 linked source
Open source record