PYSEC-2026-2539 jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories

Summary jupyterlab-git 0.53.0 latest, 2026-04-30 uses fnmatch.fnmatchcase in GitHandler.prepare jupyterlabgit/handlers.py:91 to enforce the admin-configured excludedpaths security control. Because fnmatchcase is unconditionally case-sensitive, an authenticated user on a case-insensitive filesyste...

CVE-2026-55170

A flaw was found in OpenFGA, an authorization/permission engine. When using MySQL as the datastore, and authorization decisions depend on case-sensitive user strings, the system may incorrectly treat case-distinct values e.g., 'user:Alice' and 'user:alice' as equivalent. This can lead to improper...

CVE-2026-54528

A flaw was found in JupyterLab Git, a Git extension for JupyterLab. This vulnerability allows an authenticated user on a case-insensitive filesystem to bypass administrator-configured excluded paths by varying the case of the URL path segment. This bypass enables the user to read file content, vi...

CVE-2026-55170

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorizationmodel identifier columns can compare case-distinct values such as...

CVE-2026-55170 OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorizationmodel identifier columns can compare case-distinct values such as...

CVE-2026-55170 OpenFGA MySQL backend: case-insensitive collation on identifier columns causes incorrect authorization decisions

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorizationmodel identifier columns can compare case-distinct values such as...

EUVD-2026-42705

OpenFGA is an authorization/permission engine built for developers. Prior to 1.18.0, when MySQL is being used as the datastore and authorization decisions rely on case-sensitive user strings, the tuple, changelog, and authorizationmodel identifier columns can compare case-distinct values such as...

K000162157: Apache Tomcat vulnerability CVE-2026-43513 and CVE-2026-43515

Security Advisory Description CVE-2026-43513 Improper Handling of Case Sensitivity vulnerability in LockOutRealm in Apache Tomcat. This issue affects Apache Tomcat: from 11.0.0-M1 through 11.0.21, from 10.1.0-M1 through 10.1.54, from 9.0.0.M1 through 9.0.117, from 8.5.0 through 8.5.100, from 7.0....

CVE-2026-54528 jupyterlab-git excluded_paths Case-Sensitivity Bypass Allows Reading Excluded Directories

JupyterLab Git is a Git extension for JupyterLab. Prior to 0.54.0, jupyterlab-git uses fnmatch.fnmatchcase in GitHandler.prepare in jupyterlabgit/handlers.py to enforce excludedpaths, allowing an authenticated user on a case-insensitive filesystem to vary URL path casing and read excluded...

crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application

A flaw was found in the crypto/x509 package within Go golang. When verifying a certificate chain, excluded DNS Domain Name System constraints are not correctly applied to wildcard DNS Subject Alternative Names SANs if the case of the SAN differs from the constraint. This oversight could allow an...

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...

JLSEC-2026-655 Deno: Permission Bypass via Unicode Normalization Mismatch on macOS (APFS)

Summary Deno's permission system enforces filesystem and execution restrictions by comparing the requested path against the path supplied to --deny-read, --deny-write, --deny-run, or --deny-ffi. On macOS, that comparison was done at the raw-byte level while the APFS filesystem treats different...

PYSEC-2026-1931 social-auth-app-django affected by Improper Handling of Case Sensitivity

Impact Due to default case-insensitive collation in MySQL or MariaDB databases, third-party authentication user IDs are not case-sensitive and could cause different IDs to match. Patches This issue has been addressed by https://github.com/python-social-auth/social-app-django/pull/566 and fix...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate users or escalate privileges by injecting underscore-variant headers that bypass canonical header strippin...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate users or escalate privileges by injecting underscore-variant headers that bypass canonical header strippin...

Improper Handling of Case Sensitivity

Overview github.com/traefik/traefik/v2/pkg/server is a server package for traefik, a cloud native edge router. Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate user...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate users or escalate privileges by injecting underscore-variant headers that bypass canonical header strippin...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate users or escalate privileges by injecting underscore-variant headers that bypass canonical header strippin...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate users or escalate privileges by injecting underscore-variant headers that bypass canonical header strippin...

Improper Handling of Case Sensitivity

Overview Affected versions of this package are vulnerable to Improper Handling of Case Sensitivity via the handling of HTTP headers in authentication middlewares. An attacker can impersonate users or escalate privileges by injecting underscore-variant headers that bypass canonical header strippin...