CVE-2026-105832: EspoCRM Authentication Bypass Vulnerability

CVE-2026-105832 Overview

CVE-2026-105832 is an authentication bypass vulnerability in EspoCRM versions before 10.0.6. The flaw accepts a login session stopped at the second factor on routes that do not require authentication. Attackers who already know a 2FA-enabled user's username and password can skip the second factor to read configuration parameters not intended for public exposure. The vulnerability is tracked under CWE-287: Improper Authentication and documented in GitHub Security Advisory GHSA-ph8v-hvf5-wgp9.

Critical Impact
Attackers with valid first-factor credentials can bypass two-factor authentication to retrieve non-public configuration parameters from affected EspoCRM instances.

Affected Products

EspoCRM versions prior to 10.0.6
Self-hosted EspoCRM deployments with 2FA enabled for user accounts
EspoCRM instances exposing unauthenticated routes that read configuration parameters

Discovery Timeline

2026-10-08 - CVE-2026-105832 published to NVD
2026-10-08 - Last updated in NVD database

Technical Details for CVE-2026-105832

Vulnerability Analysis

The vulnerability resides in how EspoCRM handles authentication state for requests targeting routes that do not require full authentication. When a user authenticates with username and password but has not yet completed the second factor, the application retains a partial login state. Routes that are classified as not requiring authentication inspect this partial state and treat the requester as sufficiently authenticated for their purpose. This allows a user stuck at the 2FA step to issue requests that read configuration parameters otherwise restricted from public access.

The impact is scoped to information disclosure. The attacker must already hold valid primary credentials, which limits the attack surface to credential-aware adversaries, including insiders, phishing victims' attackers, and operators of credential stuffing campaigns. The CWE-287 classification reflects an authentication logic flaw rather than a cryptographic weakness. Fixes are shipped in EspoCRM 10.0.6.

Root Cause

The root cause is improper enforcement of the two-factor authentication gate on routes marked as not requiring authentication. The access control logic conflates "no authentication required" with "partially authenticated sessions acceptable," permitting state-leaking endpoints to be reached without second-factor validation.

Attack Vector

Exploitation requires network access to the EspoCRM web interface and prior knowledge of a 2FA-enabled user's username and password. The attacker submits valid primary credentials, obtains the partial session state, and then issues requests to unauthenticated routes that return configuration data. No user interaction or elevated privileges beyond the stolen first-factor credentials are needed. See the VulnCheck Advisory for additional detail.

Detection Methods for CVE-2026-105832

Indicators of Compromise

Successful first-factor logins from a given account that are not followed by a second-factor completion event, yet are followed by subsequent API requests from the same session.
Unexpected access to configuration endpoints on EspoCRM from sessions associated with 2FA-enrolled users.
Spikes in requests to routes classified as unauthenticated originating from newly authenticated session cookies.

Detection Strategies

Review EspoCRM web server and application logs for sessions that stop at the 2FA challenge but issue follow-on requests to non-login routes.
Correlate authentication events with subsequent API calls to identify sessions that read configuration data without completing 2FA.
Monitor for anomalous access patterns from accounts enrolled in 2FA, particularly outside normal working hours or from new IP addresses.

Monitoring Recommendations

Ingest EspoCRM access and authentication logs into a central SIEM or data lake for correlation and alerting.
Alert on repeated failed 2FA completions followed by successful requests from the same session identifier.
Baseline normal configuration-read activity per account and flag deviations.

How to Mitigate CVE-2026-105832

Immediate Actions Required

Upgrade all EspoCRM instances to version 10.0.6 or later as the authoritative remediation.
Rotate credentials for any accounts suspected to have been exposed through phishing, credential stuffing, or prior breach.
Audit configuration parameters previously accessible through unauthenticated routes and treat any sensitive values as potentially disclosed.

Patch Information

The vendor has released EspoCRM 10.0.6 with the fix. See the GitHub Security Advisory GHSA-ph8v-hvf5-wgp9 for release notes and commit references. Apply the patched version through the standard EspoCRM upgrade procedure and verify the running version after upgrade.

Workarounds

Restrict network access to the EspoCRM web interface using IP allowlists or a VPN until the upgrade can be deployed.
Enforce strong, unique passwords and monitor for credential reuse to reduce the viability of the required first-factor compromise.
Review and minimize data exposed by configuration endpoints so that any residual disclosure has reduced value.

bash

# Verify the installed EspoCRM version after upgrade
grep -R "'version'" /path/to/espocrm/application/Espo/Resources/defaults/config.php

# Example reverse-proxy allowlist (nginx) to limit exposure during remediation
# location / {
#     allow 10.0.0.0/8;
#     deny all;
#     proxy_pass http://espocrm_backend;
# }