---
title: "CVE-2026-62379: OpenAM: Unauthenticated Remote Code Execution via Class.forName in AuthXMLUtils.createCustomCallback"
url: https://erroneo.us/security/cve/CVE-2026-62379/
description: "CVE-2026-62379 (org.openidentityplatform.openam:openam-core (Maven)): Open Access Management (OpenAM) is an access management solution. Prior to 16.1.2, the…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-09-15
date_modified: 2026-09-15
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-62379"
kev: false
cvss: 9.8
epss: 0.01066
license: All rights reserved. Quote with attribution and a link.
---

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

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- No confirmed exploitation. It is not in CISA’s KEV catalog and CISA’s SSVC assessment records no known exploitation. That can change quickly after a public write-up; re-check if you are affected.
- EPSS 1.1% , percentile 64: FIRST’s model estimates a 1.1% chance of exploitation activity in the next 30 days, higher than 64% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes org.openidentityplatform.openam:openam-core (Maven) <= 16.1.1, fixed in 16.1.2 . Check your lockfile, including transitive dependencies.

## What it is

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.

## Affected packages

- Maven `org.openidentityplatform.openam:openam-core` <= 16.1.1 → fixed: 16.1.2

## Affected products (CVE record)

- OpenIdentityPlatform OpenAM: < 16.1.2

## Severity

- GitHub_M CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`
- GitHub CVSS 3.1: 9.8 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation none , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 1.07% probability of exploitation activity in the next 30 days; percentile 64.

## Sources

- [GitHub Advisory GHSA-wg5r-wc3x-39vc](https://github.com/advisories/GHSA-wg5r-wc3x-39vc)
- [CVE.org record CVE-2026-62379](https://www.cve.org/CVERecord?id=CVE-2026-62379)
- [NVD entry CVE-2026-62379](https://nvd.nist.gov/vuln/detail/CVE-2026-62379)
- [github.com](https://github.com/OpenIdentityPlatform/OpenAM/security/advisories/GHSA-wg5r-wc3x-39vc)
- [github.com](https://github.com/OpenIdentityPlatform/OpenAM/commit/edcf968cad91a78b932dba4ad559ef94cbf35f5a)
- [github.com](https://github.com/OpenIdentityPlatform/OpenAM/releases/tag/16.1.2)

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Source page: https://erroneo.us/security/cve/CVE-2026-62379/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt