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  4. CVE 2026 15638 cryptographic padding oracle
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Back to active CVEs
Critical · CVSS 9.1CVE-2026-15638

Cryptographic Padding OracleCVE-2026-15638

Answer in brief

CVE-2026-15638 records a Critical severity (CVSS 9.1) vulnerability in Cryptographic Padding Oracle. 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 Nov 1, 2026First seen by HOL Sep 15, 2026Material review Sep 18, 2026
Upstream Advisory

Key facts

Risk
Critical · CVSS 9.1
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 9.1. 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>=10.5.1 <=12.1.3Not reported
Delinea/Secret Server (On-Prem)generic10.5.1Not 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

An unauthenticated user with access to Secret Server could leverage a padding oracle to decrypt or encrypt data using one of the server's cryptographic keys. The key itself is not exposed.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Missing Auth
EPSS
Not reported
CWE IDs
CWE-327
Source
CVE List V5
Source checked
Nov 1, 2026
References
1 linked source
Open source record