PYSEC-2026-1399 Fugue is Vulnerable to Remote Code Execution by Pickle Deserialization via FlaskRPCServer

Summary The Fugue framework implements an RPC server system for distributed computing operations. In the core functionality of the RPC server implementation, I found that the decode function in fugue/rpc/flask.py directly uses cloudpickle.loads to deserialize data without any sanitization. This...

PYSEC-2026-1378 Flask App Builder has an Authentication Bypass vulnerability when using non AUTH_DB methods

Impact When Flask-AppBuilder is configured to use OAuth, LDAP, or other non-database authentication methods, the password reset endpoint remains registered and accessible, despite not being displayed in the user interface. This allows an enabled user to reset their password and be able to create...

Flask App Builder has an Authentication Bypass vulnerability when using non AUTH_DB methods

ImpactWhen Flask-AppBuilder is configured to use OAuth, LDAP, or other non-database authentication methods, the password reset endpoint remains registered and accessible, despite not being displayed in the user interface. This allows an enabled user to reset their password and be able to create J...

Flask uses fallback key instead of current signing key

In Flask 3.1.0, the way fallback key configuration was handled resulted in the last fallback key being used for signing, rather than the current signing key.Signing is provided by the itsdangerous library. A list of keys can be passed, and it expects the last top key in the list to be the most...

Flask-AppBuilder open redirect vulnerability using HTTP host injection

ImpactFlask-AppBuilder prior to 4.6.2 would allow for a malicious unauthenticated actor to perform an open redirect by manipulating the Host header in HTTP requests. PatchesFlask-AppBuilder 4.6.2 introduced the FABSAFEREDIRECTHOSTS configuration variable, which allows administrators to explicitly...

PYSEC-2026-1377 Flask uses fallback key instead of current signing key

In Flask 3.1.0, the way fallback key configuration was handled resulted in the last fallback key being used for signing, rather than the current signing key. Signing is provided by the itsdangerous library. A list of keys can be passed, and it expects the last top key in the list to be the most...

PYSEC-2026-1379 Flask-AppBuilder open redirect vulnerability using HTTP host injection

Impact Flask-AppBuilder prior to 4.6.2 would allow for a malicious unauthenticated actor to perform an open redirect by manipulating the Host header in HTTP requests. Patches Flask-AppBuilder 4.6.2 introduced the FABSAFEREDIRECTHOSTS configuration variable, which allows administrators to explicit...

PYSEC-2026-1383 Flask-CORS vulnerable to Improper Handling of Case Sensitivity

corydolphin/flask-cors version 5.0.1 contains a vulnerability where the request path matching is case-insensitive due to the use of the trymatch function, which is originally intended for matching hosts. This results in a mismatch because paths in URLs are case-sensitive, but the regex matching...

PYSEC-2026-1384 Flask-CORS improper regex path matching vulnerability

corydolphin/flask-cors version 5.0.1 contains an improper regex path matching vulnerability. The plugin prioritizes longer regex patterns over more specific ones when matching paths, which can lead to less restrictive CORS policies being applied to sensitive endpoints. This mismatch in regex...

PYSEC-2026-1385 Flask-CORS allows for inconsistent CORS matching

A vulnerability in corydolphin/flask-cors version 5.0.1 allows for inconsistent CORS matching due to the handling of the '+' character in URL paths. The request.path is passed through the unquoteplus function, which converts the '+' character to a space ' '. This behavior leads to incorrect path...

PYSEC-2026-1842 pyspider Cross-Site Request Forgery (CSRF) via the Flask endpoints

binux pyspider up to v0.3.10 was discovered to contain a Cross-Site Request Forgery CSRF via the Flask endpoints...

PYSEC-2026-1382 Flask-AppBuilder's login form allows browser to cache sensitive fields

Impact Auth DB login form default cache directives allows browser to locally store sensitive data. This can be an issue on environments using shared computer resources. Patches Upgrade flask-appbuilder to version 4.5.1 Workarounds If upgrading is not possible configure your web server to send the...

PYSEC-2026-2002 Vanna vulnerable to SQL Injection

vanna-ai/vanna version v0.3.4 is vulnerable to SQL injection in some file-critical functions such as pgreadfile. This vulnerability allows unauthenticated remote users to read arbitrary local files on the victim server, including sensitive files like /etc/passwd, by exploiting the exposed SQL...

PYSEC-2026-1381 Flask-AppBuilder's OAuth login page subject to Cross Site Scripting (XSS)

Impact A Cross-Site Scripting XSS vulnerability has been discovered on the OAuth login page. An attacker could trick a user to follow a specially crafted URL to the OAuth login page. This URL could inject and execute malicious javascript code that would get executed on the user's browser. Impacte...

PYSEC-2026-1820 pyload Unauthenticated Flask Configuration Leakage vulnerability

Summary Any unauthenticated user can browse to a specific URL to expose the Flask config, including the SECRETKEY variable. Details Any unauthenticated user can browse to a specific URL to expose the Flask config, including the SECRETKEY variable. PoC Run pyload in the default configuration by...

PYSEC-2026-1380 Flask-AppBuilder Has No Rate Limiting on Login AUTH DB

Impact Lack of rate limiting will allow an attacker to brute-force user credentials. Patches Ability to enable rate limiting on Flask-AppBuilder = 4.3.0. Use AUTHRATELIMITED = True and RATELIMITENABLED = True set the limit itself by using AUTHRATELIMIT. Will apply only to database authentication...

PYSEC-2026-809 Flask-Security vulnerable to Open Redirect

This affects all versions of package Flask-Security. When using the getpostlogoutredirect and getpostloginredirect functions, it is possible to bypass URL validation and redirect a user to an arbitrary URL by providing multiple back slashes such as \\evil.com/path. This vulnerability is only...

PYSEC-2026-635 Open Redirect in Flask-AppBuilder

Flask-AppBuilder is an application development framework built on top of Flask. Versions prior to 3.4.5 contain an open redirect vulnerability when using the database authentication login page. There are no known workarounds. Users are recommended to upgrade to version 3.4.5 or later. For more...

PYSEC-2026-505 Injection vulnerability that affects ironic-discoverd

OpenStack Ironic Inspector aka ironic-inspector or ironic-discoverd, when debug mode is enabled, might allow remote attackers to access the Flask console and execute arbitrary Python code by triggering an error...

PYSEC-2026-341 Flask-Reuploaded vulnerable to Remote Code Execution via Server-Side Template Injection

Impact A critical path traversal and extension bypass vulnerability in Flask-Reuploaded allows remote attackers to achieve arbitrary file write and remote code execution through Server-Side Template Injection SSTI. Patches Flask-Reuploaded has been patched in version 1.5.0 Workarounds 1. Do not...