# CVE-2026-62379: OpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCustomCallback

> Unauthenticated attackers can execute arbitrary code on OpenAM servers by exploiting unsafe class loading in the authentication service endpoint.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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:** Yes
- **Published:** 15 Sep 2026
- **Updated:** 15 Sep 2026
- **Also known as:** GHSA-wg5r-wc3x-39vc, UBUNTU-CVE-2026-62379

## What is CVE-2026-62379?

CVE-2026-62379 is a critical code injection vulnerability in OpenIdentityPlatform OpenAM, published on 15 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Open Access Management (OpenAM) is an access management solution. Prior to 16.1.2, the pre-authentication /authservice PLL endpoint accepts a CustomCallback XML element whose className value selects an arbitrary Java class for AuthXMLUtils to load and instantiate without verifying that it implements DSAMECallbackInterface. Default configurations expose the endpoint without authentication, allowing attacker-controlled class initialization and unsafe deserialization of a serialized Subject value to execute code in the server process. Enabling sunRemoteAuthSecurityEnabled does not prevent the vulnerable parsing and instantiation because its check occurs later. This issue is fixed in version 16.1.2.

Weakness: CWE-94 (Improper Control of Generation of Code), CWE-470 (Use of Externally-Controlled Input to Select Classes or Code)

## Which versions are affected by CVE-2026-62379?

2 open source packages ship an affected version, including org.openidentityplatform.openam:openam-core.


| Package | Ecosystem | Affected | Fixed in |
| --- | --- | --- | --- |
| `org.openidentityplatform.openam:openam-core` | Maven | All versions | 16.1.2 |
| `org.openidentityplatform.openam:openam-core` | Maven | All versions | 16.1.2 |

## How do I fix CVE-2026-62379?

Upgrade org.openidentityplatform.openam:openam-core to 16.1.2 or later.

## Is CVE-2026-62379 being exploited?

There is no known exploitation of CVE-2026-62379 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-62379 and fix it if it is affected.

What it is: CVE-2026-62379 is a critical code injection vulnerability in OpenIdentityPlatform OpenAM, published on 15 Sep 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-2026-62379 in the wild and no public exploit code.

Affected packages and fixed versions:
- org.openidentityplatform.openam:openam-core (Maven): affected all versions; fixed in 16.1.2
- org.openidentityplatform.openam:openam-core (Maven): affected all versions; fixed in 16.1.2

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-2026-62379/ (Markdown: https://insights.sbomify.com/CVE-2026-62379/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-62379
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-62379
- OSV: https://osv.dev/vulnerability/CVE-2026-62379

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-62379/
Summaries are generated and may contain mistakes; the official description above is the record.