major vulnerability· requires attention

Remote code execution in widely used SAP NetWeaver component (Knowledge Management). High-impact enterprise product; broad cross-industry risk and newsworthy.

ERP

CVE-2026-109803

9.9

Critical

EPSS n/aPatch available

Authenticated XSLT processing flaw allows RCE in SAP NetWeaver Knowledge Management.

exploited

No known exploitation not in CISA KEV as of our last sync

fix

Patch available see the advisory in the references

likelihood

No EPSS score yet

Published 10 Nov 2026Analysed here 10 Nov 2026CVSS scored by the publisher (CNA)

common questions

Is CVE-2026-109803 being exploited?

Not confirmed. CVE-2026-109803 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked.

How severe is CVE-2026-109803?

CVE-2026-109803 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.

Is there a patch for CVE-2026-109803?

Yes. A fix has been recorded for CVE-2026-109803. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.

What does CVE-2026-109803 affect?

CVE-2026-109803 affects SAP NetWeaver Knowledge Management (XML Forms). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.

What should I do about CVE-2026-109803?

Apply SAP note 3809153 patch immediately; restrict access to XML Forms and monitor logs.

Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.

executive summary

technical analysis

affected

SAP NetWeaver Knowledge Management (XML Forms)

impact

Authenticated user can trigger unauthorized XSL transformation to achieve arbitrary code execution, enabling full application compromise.

action required

Immediate action required

affected versions

SAP_SE SAP NetWeaver Knowledge Management (XML Forms)

affectedKMC-CM 7.50

As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.

timeline

10 Nov 2026Published
10 Nov 2026CVE record last updated · same day later
10 Nov 2026Analysed by vulneraibility.com · same day later

how to fix

Remediation steps are tailored for users whose stack is affected. Add this technology to your stack to see the fix checklist.

references

NVD CVE.org CVE Details Source

2 references in the CVE record: 2 links

Linkme.sap.com /notes/3809153
Linkurl.sap /sapsecuritypatchday

sources

CVE List (CVE.org): description, affected versions, references; CVE Terms of Use
NVD: CVSS and CPE data
FIRST EPSS: exploit probability and percentile
Summary, impact and triage tags: written by our AI analysis pipeline from the sources above. Check them against the sources.

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