# CVE-2026-23822: Unauthenticated XML External Entity Injection in AOS-8 Instant allows Denial of Service

> Unauthenticated attackers can cause denial of service in ArubaOS Instant Access Points via XML External Entity injection in DHCP services.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 12 May 2026
- **Updated:** 12 May 2026
- **Also known as:** GHSA-xrfm-m363-m483

## What is CVE-2026-23822?

CVE-2026-23822 is a medium-severity vulnerability in Arubanetworks Arubaos, published on 12 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

A vulnerability in the XML handling component of AOS-8 DHCP services could allow an unauthenticated remote attacker to trigger a denial-of-service condition. Successful exploitation could allow an attacker to cause excessive resource consumption upon user interaction, leading to service disruption or reduced availability of the affected system.

NOTE: This vulnerability only impacts Access Points running AOS Instant 8.x.x.x

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

## Which versions are affected by CVE-2026-23822?

It affects 1 product.


Products: Arubanetworks Arubaos.

## How do I fix CVE-2026-23822?

No fix has been published for CVE-2026-23822 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-23822 being exploited?

There is no known exploitation of CVE-2026-23822 in the wild and no public exploit code.

## Other vulnerabilities in Arubanetworks Arubaos

- [CVE-2024-42393](https://insights.sbomify.com/CVE-2024-42393/): Memory corruption in Hpe Aruba Networking InstantOS and Aruba Access Points running ArubaOS 10 (critical 9.8)
- [CVE-2024-42394](https://insights.sbomify.com/CVE-2024-42394/): Memory corruption in HPE Aruba Networking InstantOS and Aruba Access Points running ArubaOS 10 (critical 9.8)
- [CVE-2024-42395](https://insights.sbomify.com/CVE-2024-42395/): Memory corruption in HPE Aruba Networking InstantOS and Aruba Access Points running ArubaOS 10 (critical 9.8)
- [CVE-2024-31466](https://insights.sbomify.com/CVE-2024-31466/): Unauthenticated Buffer Overflow Vulnerabilities in CLI Service Accessed by the PAPI Protocol (critical 9.8)
- [CVE-2024-31467](https://insights.sbomify.com/CVE-2024-31467/): Unauthenticated Buffer Overflow Vulnerabilities in CLI Service Accessed by the PAPI Protocol (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-23822 and fix it if it is affected.

What it is: CVE-2026-23822 is a medium-severity vulnerability in Arubanetworks Arubaos, published on 12 May 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-23822 in the wild and no public exploit code.

Affected product: Arubanetworks Arubaos. 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-2026-23822/ (Markdown: https://insights.sbomify.com/CVE-2026-23822/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-23822
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-23822
- OSV: https://osv.dev/vulnerability/CVE-2026-23822

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-23822/
Summaries are generated and may contain mistakes; the official description above is the record.