CVE-2026-68923: Cross-Site Request Forgery (CSRF) in Mobile Security Framework (MobSF)

Mobile Security Framework (MobSF) is an automated, web-based platform utilized extensively by security engineers, penetration testers, and malware analysts to analyze mobile application binaries. The tool hosts a web-based management portal that exposes standard HTTP endpoints to perform actions like file uploads, database queries, and static or dynamic analyses. Due to its deployment patterns, MobSF frequently runs locally or within restricted staging boundaries, which makes it a highly targeted component within security orchestrations.

During an internal code refactoring and migration to support contemporary versions of the Django web framework, a significant configuration discrepancy occurred. This error completely disabled the application's global cross-site request forgery (CSRF) protections, clickjacking protections, and critical transport security controls. This vulnerability, designated CVE-2026-68923, exposes authenticated sessions on the platform to unauthorized remote manipulations.

An attacker targeting this vulnerability relies on an authenticated user interacting with a malicious cross-origin site. The attack relies on standard browser cookie delegation mechanisms, wherein safe context execution is hijacked via malicious scripts hosted externally. The impact includes arbitrary script execution, file generation, scan deletions, and full account takeover without direct attacker authentication.

The underlying issue stems from a legacy configuration paradigm in Django. Historically, Django utilized the MIDDLEWARE_CLASSES list in settings.py to organize sequential security and routing filters. In Django 1.10, the framework introduced the modernized MIDDLEWARE tuple structure, deprecated the old parameter, and eventually rendered MIDDLEWARE_CLASSES entirely inactive in subsequent releases.

When the developers updated the Django dependencies within MobSF, they declared both the new MIDDLEWARE list and preserved the old MIDDLEWARE_CLASSES list in mobsf/MobSF/settings.py. However, during the transition, several essential security middleware modules remained exclusively declared within the deprecated MIDDLEWARE_CLASSES structure, while the active MIDDLEWARE declaration omitted them.

Specifically, django.middleware.csrf.CsrfViewMiddleware, django.middleware.security.SecurityMiddleware, and django.middleware.clickjacking.XFrameOptionsMiddleware were completely missing from the executed MIDDLEWARE list. As a direct result, Django did not inject CSRF tokens into rendering forms, nor did it perform verification of incoming unsafe HTTP methods such as POST, PUT, and DELETE. The platform processed state-changing requests purely on the basis of active session cookies, creating a classic CSRF condition.

To understand the vulnerability, it is necessary to examine the composition of the middleware configurations before the remediation. In versions prior to 4.5.1, the configuration file mobsf/MobSF/settings.py retained the dead configuration block alongside the active, stripped-down configuration block.

# Vulnerable Configuration (mobsf/MobSF/settings.py)
MIDDLEWARE_CLASSES = (
    'django.middleware.security.SecurityMiddleware',
    'whitenoise.middleware.WhiteNoiseMiddleware',
    'django.middleware.common.CommonMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware',               # Active only in legacy block
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.auth.middleware.SessionAuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware',  # Active only in legacy block
    'django_ratelimit.middleware.RatelimitMiddleware',
)
 
MIDDLEWARE = (
    # SecurityMiddleware is omitted here
    'mobsf.MobSF.views.api.api_middleware.RestApiAuthMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    # CsrfViewMiddleware is omitted here
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    # XFrameOptionsMiddleware is omitted here
)

Because the Django runtime executed solely the class references within the MIDDLEWARE tuple, the omission of CsrfViewMiddleware rendered the entire web platform vulnerable to CSRF. Furthermore, the absence of SecurityMiddleware deactivated HTTP Strict Transport Security (HSTS) headers, X-Content-Type-Options, and SSL redirection patterns, while the omission of XFrameOptionsMiddleware left the web UI vulnerable to frame-injection attacks.

The fix applied in patch commit 62563ca429a75b3e5d47a13b958e1d2e7d5e2bbf entirely removed the MIDDLEWARE_CLASSES block to clear dead configuration patterns and restructured the active MIDDLEWARE sequence to restore critical security protections:

# Patched Configuration (mobsf/MobSF/settings.py)
MIDDLEWARE = (
    'django.middleware.security.SecurityMiddleware', # Restored
    'mobsf.MobSF.views.api.api_middleware.RestApiAuthMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware', # Restored
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware', # Restored
)

Exploiting this vulnerability does not require complex cryptographic bypasses or specific memory layouts. The attacker only needs to target the location of the MobSF instance (which is commonly hosted on local developer ports like http://localhost:8000 or standard internal network domains) and induce an authenticated user to load a malicious web resource.

The attacker crafts an HTML page that triggers a cross-origin POST request to target sensitive endpoints within MobSF. Since the CsrfViewMiddleware is not present to validate the request origin or token, the browser automatically forwards the legitimate session cookie (sessionid) associated with the MobSF domain.

An example payload targeting the administrative account creation endpoint illustrates this methodology:

<!-- Malicious host: attacker-controlled-domain.com/exploit.html -->
<form id="csrfForm" action="http://localhost:8000/create_user/" method="POST">
    <input type="hidden" name="username" value="backdoor_admin" />
    <input type="hidden" name="password" value="ComplexPassword987!" />
    <input type="hidden" name="role" value="admin" />
</form>
<script>
    document.getElementById('csrfForm').submit();
</script>

Upon visiting the host containing this script, the victim's browser silently executes the submission. The server processes the parameters, authenticates the state change via the existing session cookie, and successfully provisions the user. Other critical endpoints, such as /delete_scan/ and /upload/, are equally susceptible to this exploitation pattern.

The impact of CVE-2026-68923 is significant because it allows complete control over the internal state of a security testing tool. Mobile Security Framework instances often hold sensitive application source code, reverse-engineered binaries, intellectual property, API keys, and structural endpoints extracted during dynamic analysis. Compromising the integrity of this platform exposes entire development pipelines to inspection and disruption.

By leveraging CSRF, an external threat actor can execute destructive database operations, such as removing historical vulnerability scan databases. Alternatively, they can inject malicious code by forcing the platform to upload and process weaponized binary formats, which might trigger secondary command-execution vulnerabilities during extraction or decompilation.

The ability to add unauthorized users allows persistent access to the testing framework. Because CVSS v3.1 assigns this vulnerability a base score of 6.5 with high integrity impact, the assessment reflects the severity of state-changing operations. Despite requiring user interaction, the probability of targeting local resources within devops pipelines remains elevated.

Remediation requires immediate migration to Mobile Security Framework version 4.5.1 or newer. This upgrade ensures that the redundant configuration elements are eliminated and the mandatory Django security components are placed correctly within the middleware execution sequence.

If an immediate upgrade is not feasible, administrators can temporarily mitigate the risk by manually editing mobsf/MobSF/settings.py to align with the patched middleware sequence. The django.middleware.csrf.CsrfViewMiddleware must be explicitly added to the active MIDDLEWARE definition list, and any deprecated MIDDLEWARE_CLASSES references should be fully excised to prevent configuration errors.

# Temporary Workaround in settings.py
MIDDLEWARE = (
    'django.middleware.security.SecurityMiddleware',
    'mobsf.MobSF.views.api.api_middleware.RestApiAuthMiddleware',
    'django.contrib.sessions.middleware.SessionMiddleware',
    'django.middleware.csrf.CsrfViewMiddleware', # Manually restore
    'django.contrib.auth.middleware.AuthenticationMiddleware',
    'django.contrib.messages.middleware.MessageMiddleware',
    'django.middleware.clickjacking.XFrameOptionsMiddleware', # Manually restore
)

In addition to code-level changes, organizations should implement strict browser-level security policies. Restricting the MobSF daemon binding address to a dedicated loopback interface (127.0.0.1) rather than wildcard bindings (0.0.0.0), using isolated browser profiles, and enforcing reverse proxy configurations with explicit Origin validation can mitigate cross-origin attack vectors.