# CVE-2026-123766: Apache Axis2/Java: Cross-site scripting in the OpenAPI module's Swagger UI page


- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Fix available:** No
- **Published:** 9 Nov 2026
- **Updated:** 12 Nov 2026
- **Also known as:** GHSA-84h8-j9vj-p626

## What is CVE-2026-123766?

CVE-2026-123766 is a medium-severity vulnerability in Apache Axis2/Java, published on 9 Nov 2026. 

### Official description

Improper Neutralization of Input During Web Page Generation (Cross-site Scripting) vulnerability in the OpenAPI module of Apache Axis2/Java. The Swagger UI page served by the OpenAPI module wrote a value derived from the request's Host header into the page without encoding, allowing script injection in the context of the Axis2 origin. This issue affects Apache Axis2/Java: 2.0.1. Users are recommended to upgrade to version 2.0.2, which fixes the issue.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-123766?


## How do I fix CVE-2026-123766?

No fix has been published for CVE-2026-123766 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-123766 being exploited?

There is no known exploitation of CVE-2026-123766 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-123766 and fix it if it is affected.

What it is: CVE-2026-123766 is a medium-severity vulnerability in Apache Axis2/Java, published on 9 Nov 2026. 
Exploitation: There is no known exploitation of CVE-2026-123766 in the wild and no public exploit code.

Affected product: Apache Axis2/Java. 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-2026-123766/ (Markdown: https://insights.sbomify.com/CVE-2026-123766/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-123766
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-123766
- OSV: https://osv.dev/vulnerability/CVE-2026-123766

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-123766/
Summaries are generated and may contain mistakes; the official description above is the record.