# CVE-2026-3415: XML external entity in WSO2 API Control Plane

> A highly privileged attacker can exploit XML schema validation to read server files and cause denial of service in WSO2 API products.

- **Severity:** High 8.7 (`CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Aug 2026
- **Updated:** 28 Oct 2026
- **Also known as:** GHSA-43j6-vwqq-5w56

## What is CVE-2026-3415?

CVE-2026-3415 is a high-severity vulnerability in WSO2 API Control Plane, published on 6 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.

### Official description

The XML and schema validation functionalities within the SchemaValidator Mediator process XML input as part of validation flows. Under certain conditions, the XML parser allows the resolution of external entities when handling user-supplied XML content during validation operations. This behavior can occur when an attacker supplies crafted XML payloads to the relevant mediator flows with sufficient privileges.

Successful exploitation may allow a highly privileged actor to read files accessible within the server hosting the affected product. Additionally, it may be possible to trigger outbound requests to unintended internal or external locations, depending on the server environment and network configuration. Specially crafted XML payloads can also lead to excessive resource consumption during parsing, impacting the availability of the product.

Weakness: CWE-776 (Improper Restriction of Recursive Entity References in DTDs)

## Which versions are affected by CVE-2026-3415?


## How do I fix CVE-2026-3415?

No fix has been published for CVE-2026-3415 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-3415 being exploited?

There is no known exploitation of CVE-2026-3415 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-3415 and fix it if it is affected.

What it is: CVE-2026-3415 is a high-severity vulnerability in WSO2 API Control Plane, published on 6 Aug 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-3415 in the wild and no public exploit code.

Affected product: WSO2 API Control Plane. 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-2026-3415/ (Markdown: https://insights.sbomify.com/CVE-2026-3415/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-3415
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-3415
- OSV: https://osv.dev/vulnerability/CVE-2026-3415

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-3415/
Summaries are generated and may contain mistakes; the official description above is the record.