October 2026 highlights an important gap in SAP vulnerability management: security advisories published outside the traditional SAP Security Notes process can go unnoticed—even when they describe critical vulnerabilities.
This second part of the blog post is intended for security professionals and technical teams, offering detailed vulnerability information and practical remediation guidance.
SAP's October 2026 Security Patch Day brought an unexpected development. In addition to its regular Security Notes, SAP published four security advisories on GitHub. These advisories do not have conventional SAP Security Note numbers and are therefore not listed in the usual SAP for Me Security Notes overview.
One of the advisories describes a vulnerability in the SAP Cloud SDK for Python with a CVSS score of 10.0, the maximum possible severity rating.
This raises an important question: Can organizations be confident that their SAP environments are secure if they monitor only the regular SAP Security Notes?
The October release suggests that a broader approach to vulnerability monitoring is necessary.
SAP's October 2026 security publication includes four GitHub Security Advisories in addition to the regular Security Notes.
The advisories concern different projects and vulnerabilities. Their relevance depends on the software components an organization actually uses.
CVE CVSS Affected component
CVE-2026-89111 10.0 SAP Cloud SDK for Python — OAuth2 SSRF
CVE-2026-89112 6.5 CLA-Assistant — access control and potential personal information disclosure
CVE-2026-89116 6.5 Yeoman-UI / Application Wizard extension for VS Code — OS command injection
CVE-2026-89105 4.2 SAP Cloud Security Services Integration Library — improper authentication
Source: SAP October 2026 Security Patch Day overview. Consult the individual advisories for the authoritative affected-version ranges, fixed releases, and remediation instructions.
These findings should be assessed individually. Not every component is necessarily deployed in production, and some advisories may primarily affect development tools or supporting services rather than business-critical runtime applications.
The highest-severity finding concerns the SAP Cloud SDK for Python, a library used to develop Python applications that integrate with SAP services, including services on SAP BTP.
The vulnerability is an OAuth2-related Server-Side Request Forgery (SSRF) issue.
The vulnerability affects OAuth2 token requests in multi-tenant applications. If an attacker can influence the tenant_subdomain parameter, the application may be induced to send a request to an attacker-controlled destination.
This can expose OAuth2 client credentials and potentially enable further unauthorized access, depending on the privileges associated with the credentials.
The published severity is CVSS 10.0. Security teams should treat the issue as a priority for applicability assessment and remediation.
References:
GitHub Security Advisory - CVE-2026-89111
SAP Cloud SDK for Python documentation
Affected versions: SAP Cloud SDK for Python releases earlier than 0.45.2.
Fixed version: 0.45.2.
Remediation: Upgrade to 0.45.2 or a later supported release containing the fix, then rebuild and redeploy affected applications.
This is a software dependency remediation rather than a conventional SAP application server patch. Applying unrelated SAP Notes or updating the underlying SAP system does not, by itself, correct a vulnerable Python package embedded in an application.
Security and application teams should:
- Search Python dependency manifests and lock files for sap-cloud-sdk.
- Inspect transitive dependencies, container images, build artifacts, and deployed environments.
- Identify applications using versions earlier than 0.45.2.
- Determine whether affected applications are multi-tenant and whether untrusted input can influence tenant_subdomain.
- Prioritize upgrading affected dependencies and rebuilding application artifacts.
- Verify the actual deployed version after redeployment.
- Assess whether OAuth2 client credentials should be rotated if exploitation is suspected.
Where an immediate upgrade is not possible, consult the vendor advisory for applicable mitigations. Input validation and strict allowlisting of legitimate tenant subdomains may reduce risk, but should not be treated as a substitute for installing the fix.
The other three advisories should also be included in the assessment, but remediation must follow each project's specific guidance.
For each finding, the security team should establish:
- Whether the component is present in the organization's environment.
- Which versions are affected and which release contains the fix.
- Whether the component is exposed to untrusted users or external input.
- Whether the affected software runs in production, in a development environment, or in CI/CD infrastructure.
- Whether upgrading requires an application rebuild, configuration change, or redeployment.
- How remediation will be verified and documented.
Do not assume that every advisory can be resolved by applying a conventional SAP Note. The relevant remediation may instead involve updating a package, a developer extension, or a custom application.
The most important technical lesson is that SAP vulnerability monitoring should not stop at SAP for Me.
Security teams should establish a repeatable process that includes:
- Monitoring relevant SAP-owned GitHub repositories and their security advisories.
- Identifying the software components and dependencies used across SAP applications.
- Mapping vulnerabilities to application owners and business services.
- Prioritizing remediation based on severity, exposure, and actual applicability.
- Verifying fixes in deployed artifacts rather than relying solely on dependency declarations.
- Reporting relevant findings and exceptions through the organization's established vulnerability management process.
A software bill of materials (SBOM), dependency scanning, and integration with a vulnerability management platform can improve visibility into application dependencies. These controls complement, rather than replace, the monitoring of SAP Security Notes.
The October 2026 release is a reminder that SAP security extends beyond the traditional SAP system landscape.
Cloud-native applications, developer tools, and open-source dependencies can introduce security risks that require separate monitoring and remediation workflows.
The immediate task is to assess all four GitHub advisories, prioritize CVE-2026-89111, and verify that affected applications are running fixed versions.
The longer-term task is to ensure that security advisories published outside SAP's conventional Security Notes process are incorporated into the organization's vulnerability management lifecycle.
A complete SAP security process must account for both traditional SAP Security Notes and relevant security advisories affecting the software used to build, extend, and operate SAP applications.
