# CVE-2026-40128: Directory Traversal vulnerability in SAP NetWeaver Application Server Java (Web Container)

> Unauthenticated attackers can exploit path traversal in SAP NetWeaver Java Web Container to view or modify sensitive data and cause denial of service.

- **Severity:** Critical 9.0 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 9 Jun 2026
- **Updated:** 10 Jun 2026
- **Also known as:** GHSA-xgpc-r53m-pqc6

## What is CVE-2026-40128?

CVE-2026-40128 is a critical path traversal vulnerability in SAP_SE SAP NetWeaver Application Server Java (Web Container), published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

Weakness: CWE-35 (Path Traversal: '.../...//')

## Which versions are affected by CVE-2026-40128?


## How do I fix CVE-2026-40128?

No fix has been published for CVE-2026-40128 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-40128 being exploited?

There is no known exploitation of CVE-2026-40128 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-40128 and fix it if it is affected.

What it is: CVE-2026-40128 is a critical path traversal vulnerability in SAP_SE SAP NetWeaver Application Server Java (Web Container), published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-40128 in the wild and no public exploit code.

Affected product: SAP_SE SAP NetWeaver Application Server Java (Web Container). No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-40128/ (Markdown: https://insights.sbomify.com/CVE-2026-40128/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-40128
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-40128
- OSV: https://osv.dev/vulnerability/CVE-2026-40128

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-40128/
Summaries are generated and may contain mistakes; the official description above is the record.