---
id: "CVE-2026-46619"
kind: "vulnerability"
aliases: ["CVE-2026-46619", "GHSA-xq73-fvmr-jvmm"]
title: "OpenAM Authentication Bypass via MSISDN LDAP Injection"
severity: "critical"
cvss: 9.3
epss: 0.00992
exploited: false
status: "open"
category: "package"
products: [{"name": "org.openidentityplatform.openam:openam-auth-msisdn", "fixed": ["16.1.1"], "affected": "< 16.1.1", "ecosystem": "maven"}]
ecosystems: ["maven"]
tags: ["authentication", "cwe-1188", "cwe-90", "java", "openam", "package", "self-hosted"]
not_affected_if: ["msisdn-disabled", "restricted-trusted-gateway"]
published_at: "2026-06-26T17:32:18+00:00"
first_seen_at: "2026-10-28T15:34:52+00:00"
updated_at: "2026-10-28T16:04:30+00:00"
sources: [{"source": "ghsa", "url": "https://github.com/advisories/GHSA-xq73-fvmr-jvmm", "first_seen_at": "2026-10-28T15:34:52+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46619", "first_seen_at": "2026-10-28T16:04:30+00:00"}]
---

# OpenAM Authentication Bypass via MSISDN LDAP Injection

The MSISDN authentication module concatenates a request-supplied value directly into an LDAP search filter, so an unauthenticated remote attacker can inject filter syntax. A successful injection yields a normal authenticated OpenAM session for the matched user without a password.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- maven:org.openidentityplatform.openam:openam-auth-msisdn affected < 16.1.1 fixed 16.1.1

## How to check

- Check the OpenAM version in use: `openam-auth-msisdn` below `16.1.1` is affected.
- Check whether an MSISDN module instance is enabled in any authentication chain, and whether the trusted-gateway list reaches it (the default trusts all traffic).

## Fix

- Upgrade `openam-auth-msisdn` (OpenAM Community Edition) to `16.1.1` or later.
- Until upgraded, disable the MSISDN authentication module in authentication chains or restrict the trusted-gateway list.

## Timeline

- 2026-10-28T15:34:52+00:00 ghsa https://github.com/advisories/GHSA-xq73-fvmr-jvmm
- 2026-10-28T16:04:30+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-46619

## From the sources

## Summary

**Description**

An LDAP Injection (CWE-90) vulnerability in the MSISDN authentication module allows an unauthenticated, remote attacker to obtain an arbitrary OpenAM session without a password in the default trusted gateway configuration. This impacts OpenAM Community Edition through version 16.0.6. This issue was patched in version 16.1.1.

## Impact
OpenAM deployments through version 16.0.6 that have MSISDN enabled are potentially affected. This enables a pre-authentication login bypass for any realm where an MSISDN module instance is enabled in an authentication chain and reachable through the trusted-gateway list, which allows all traffic by default. The request-supplied MSISDN value was concatenated directly into an LDAP search filter. The resulting OpenAM session is a normal authenticated session for the matched user.

## Patch
This has been patched in OpenAM Community Edition version 16.1.1. Users are encouraged to update to the latest release.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_