How severe is CVE-2026-40128?

CVE-2026-40128 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-40128 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.

How do I fix CVE-2026-40128?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

Does CVE-2026-40128 have an EU (EUVD) identifier?

Yes. CVE-2026-40128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35279.

When was CVE-2026-40128 published?

CVE-2026-40128 was published on 2026-06-09 and last updated on 2026-06-17.

CVE-2026-40128

CVE-2026-40128 is a critical-severity vulnerability with a CVSS 3.x base score of 9.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-35.

Key facts

Severity: Critical (CVSS 3.x base score 9.0)
EPSS exploit prediction: 0% (36th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-35279
Weakness: CWE-35
Published: 2026-06-09
Last modified: 2026-06-17

Description

SAP NetWeaver Application Server Java (Web Container) allows an unauthenticated attacker to craft a malicious HTTP logon request that manipulates file inclusion parameters, enabling path traversal and processing of the included file. Processing the included file could allow the attacker to view or modify sensitive information or render any part of the local system unavailable.

Frequently asked questions

What is CVE-2026-40128?: SAP NetWeaver Application Server Java (Web Container) allows an unauthenticated attacker to craft a malicious HTTP logon request that manipulates file inclusion parameters, enabling path traversal and processing of the included file. Processing the included file could allow the attacker to view or modify sensitive information or render any part of the local system unavailable.
How severe is CVE-2026-40128?: CVE-2026-40128 has a CVSS 3.x base score of 9.0, rated critical severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-40128 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (36th percentile), an estimate of the probability of exploitation in the next 30 days.
How do I fix CVE-2026-40128?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
Does CVE-2026-40128 have an EU (EUVD) identifier?: Yes. CVE-2026-40128 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-35279.
When was CVE-2026-40128 published?: CVE-2026-40128 was published on 2026-06-09 and last updated on 2026-06-17.

References

Other CWE-35 vulnerabilities

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CVE-2025-41723 — Critical (CVSS 9.8): The importFile SOAP method is vulnerable to a directory traversal attack. An unauthenticated remote attacker bypass the…
CVE-2025-42937 — Critical (CVSS 9.8): SAP Print Service (SAPSprint) performs insufficient validation of path information provided by users. An…
CVE-2025-30515 — Critical (CVSS 9.8): CyberData 011209 Intercom could allow an authenticated attacker to upload arbitrary files to multiple locations…
CVE-2026-52703 — Critical (CVSS 9.6): Unauthenticated Path Traversal in FastDup <= 2.7.2 versions.

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