• Added support for tarfile extraction filters as defined in Blog News Templates For Announcement. In particular, calls to TarFile.extract, and TarFile.extractall are no longer considered to be sinks for the py/tarslip query if a sufficiently safe filter is provided.

• Added modeling of *args and **kwargs as routed-parameters in request handlers for django/flask/FastAPI/tornado.

• Added support for type parameters in function and class definitions, as well as the new Python 3.12 type alias statement.

• Added taint-flow modeling for regular expressions with re module from the standard library.

• Added basic flow for attributes defined on classes, when the attribute lookup is on a direct reference to that class (so not instance, cls parameter, or self parameter). Example: class definition class Foo: my_tuples = (dangerous, safe) and usage SINK(Foo.my_tuples[0]).

• Added support for functions decorated with contextlib.contextmanager.
• Namespace packages in the form of regular packages with missing __init__.py-files are now allowed. This enables the analysis to resolve modules and functions inside such packages.

• Added better support for API graphs when encountering from ... import *. For example in the code from foo import *; Bar(), we will now find a result for API::moduleImport("foo").getMember("Bar").getACall()
• Deleted the deprecated isBarrierGuard predicate from the dataflow library and its uses, use isBarrier and the BarrierGuard module instead.
• Deleted the deprecated getAUse, getAnImmediateUse, getARhs, and getAValueReachingRhs predicates from the API::Node class.
• Deleted the deprecated fullyQualifiedToAPIGraphPath class from SubclassFinder.qll, use fullyQualifiedToApiGraphPath instead.
• Deleted the deprecated Paths.qll file.
• Deleted the deprecated semmle.python.security.performance folder, use semmle.python.security.regexp instead.
• Deleted the deprecated semmle.python.security.strings and semmle.python.web folders.
• Improved modeling of decoding through pickle related functions (which can lead to code execution), resulting in additional sinks for the Deserializing untrusted input query (py/unsafe-deserialization). Added support for pandas.read_pickle, numpy.load and joblib.load.

• Django Rest Framework better handles custom ModelViewSet classes functions
• Regular expression fragments residing inside implicitly concatenated strings now have better location information.

• Subterms of regular expressions encoded as single-line string literals now have better source-location information.

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• Regular expressions containing multiple parse mode flags are now interpretted correctly. For example "(?is)abc.*" with both the i and s flags.
• Added shlex.quote as a sanitizer for the py/shell-command-constructed-from-input query.

• Support analyzing packages (folders with python code) that do not have __init__.py files, although this is technically required, we see real world projects that don't have this.
• Added modeling of AWS Lambda handlers that can be identified with AWS::Serverless::Function in YAML files, where the event parameter is modeled as a remote-flow-source.
• Improvements of the aiohttp models including remote-flow-sources from type annotations, new path manipulation, and SSRF sinks.

• Fixed the computation of locations for imports with aliases in jump-to-definition.

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• The DataFlow::StateConfigSig signature module has gained default implementations for isBarrier/2 and isAdditionalFlowStep/4. Hence it is no longer needed to provide none() implementations of these predicates if they are not needed.

• Data flow configurations can now include a predicate neverSkip(Node node) in order to ensure inclusion of certain nodes in the path explanations. The predicate defaults to the end-points of the additional flow steps provided in the configuration, which means that such steps now always are visible by default in path explanations.
• Add support for Models as Data for Reflected XSS query
• Parameters with a default value are now considered a DefinitionNode. This improvement was motivated by allowing type-tracking and API graphs to follow flow from such a default value to a use by a captured variable.

• It is now possible to specify flow summaries in the format "MyPkg;Member[list_map];Argument[1].ListElement;Argument[0].Parameter[0];value"

• Deleted many models that used the old dataflow library, the new models can be found in the python/ql/lib/semmle/python/frameworks folder.
• More precise modeling of several container functions (such as sorted, reversed) and methods (such as set.add, list.append).
• Added modeling of taint flow through the template argument of flask.render_template_string and flask.stream_template_string.
• Deleted many deprecated predicates and classes with uppercase API, HTTP, XSS, SQL, etc. in their names. Use the PascalCased versions instead.
• Deleted the deprecated getName() predicate from the Container class, use getAbsolutePath() instead.
• Deleted many deprecated module names that started with a lowercase letter, use the versions that start with an uppercase letter instead.
• Deleted many deprecated predicates in PointsTo.qll.
• Deleted many deprecated files from the semmle.python.security package.
• Deleted the deprecated BottleRoutePointToExtension class from Extensions.qll.
• Type tracking is now aware of flow summaries. This leads to a richer API graph, and may lead to more results in some queries.

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• Type tracking is now aware of reads of captured variables (variables defined in an outer scope). This leads to a richer API graph, and may lead to more results in some queries.
• Added more content-flow/field-flow for dictionaries, by adding support for reads through mydict.get("key") and mydict.setdefault("key", value), and store steps through dict["key"] = value and mydict.setdefault("key", value).

• Added support for querying the contents of YAML files.

• The recently introduced new data flow and taint tracking APIs have had a number of module and predicate renamings. The old APIs remain in place for now.

• Added modeling of SQL execution in the packages sqlite3.dbapi2, cassandra-driver, aiosqlite, and the functions sqlite3.Connection.executescript/sqlite3.Cursor.executescript and asyncpg.connection.connect().
• Fixed module resolution so we allow imports of definitions that have had an attribute assigned to it, such as class Foo; Foo.bar = 42.

• Fixed some accidental predicate visibility in the backwards-compatible wrapper for data flow configurations. In particular, DataFlow::hasFlowPath, DataFlow::hasFlow, DataFlow::hasFlowTo, and DataFlow::hasFlowToExpr were accidentally exposed in a single version.

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• Added support for merging two PathGraphs via disjoint union to allow results from multiple data flow computations in a single path-problem query.

• The main data flow and taint tracking APIs have been changed. The old APIs remain in place for now and translate to the new through a backwards-compatible wrapper. If multiple configurations are in scope simultaneously, then this may affect results slightly. The new API is quite similar to the old, but makes use of a configuration module instead of a configuration class.

• Deleted the deprecated getPath and getFolder predicates from the XmlFile class.

• We use a new analysis for the call-graph (determining which function is called). This can lead to changed results. In most cases this is much more accurate than the old call-graph that was based on points-to, but we do lose a few valid edges in the call-graph, especially around methods that are not defined inside its class.

• Fixed module resolution so we properly recognize definitions made within if-then-else statements.
• Added modeling of cryptographic operations in the hmac library.

• Python 2 is no longer supported for extracting databases using the CodeQL CLI. As a consequence, the previously deprecated support for pyxl and spitfire templates has also been removed. When extracting Python 2 code, having Python 2 installed is still recommended, as this ensures the correct version of the Python standard library is extracted.

• Fixed module resolution so we properly recognize that in from <pkg> import *, where <pkg> is a package, the actual imports are made from the <pkg>/__init__.py file.

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• The PAM authorization bypass due to incorrect usage (py/pam-auth-bypass) query has been converted to a taint-tracking query, resulting in significantly fewer false positives.

• Added subprocess.getoutput and subprocess.getoutputstatus as new command injection sinks for the StdLib.
• The data-flow library has been rewritten to no longer rely on the points-to analysis in order to resolve references to modules. Improvements in the module resolution can lead to more results.
• Deleted the deprecated importNode predicate from the DataFlowUtil.qll file.
• Deleted the deprecated features from PEP249.qll that were not inside the PEP249 module.
• Deleted the deprecated werkzeug from the Werkzeug module in Werkzeug.qll.
• Deleted the deprecated methodResult predicate from PEP249::Cursor.

• except* is now supported.
• The result of Try.getAHandler and Try.getHandler(<index>) is no longer of type ExceptStmt, as handlers may also be ExceptGroupStmts (After Python 3.11 introduced PEP 654). Instead, it is of the new type ExceptionHandler of which ExceptStmt and ExceptGroupStmt are subtypes. To support selecting only one type of handler, Try.getANormalHandler and Try.getAGroupHandler have been added. Existing uses of Try.getAHandler for which it is important to select only normal handlers, will need to be updated to Try.getANormalHandler.

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• The ReDoS libraries in semmle.code.python.security.regexp have been moved to a shared pack inside the shared/ folder, and the previous location has been deprecated.

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• Fixed labels in the API graph pertaining to definitions of subscripts. Previously, these were found by getMember rather than getASubscript.
• Added edges for indices of subscripts to the API graph. Now a subscripted API node will have an edge to the API node for the index expression. So if foo is matched by API node A, then "key" in foo["key"] will be matched by the API node A.getIndex(). This can be used to track the origin of the index.
• Added member predicate getSubscriptAt(API::Node index) to API::Node. Like getASubscript(), this will return an API node that matches a subscript of the node, but here it will be restricted to subscripts where the index matches the index parameter.
• Added convenience predicate getSubscript("key") to obtain a subscript at a specific index, when the index happens to be a statically known string.

• Added the ability to refer to subscript operations in the API graph. It is now possible to write response().getMember("cookies").getASubscript() to find code like resp.cookies["key"] (assuming response returns an API node for response objects).
• Added modeling of creating Flask responses with flask.jsonify.

• Some unused predicates in SsaDefinitions.qll, TObject.qll, protocols.qll, and the pointsto/ folder have been deprecated.
• Some classes/modules with upper-case acronyms in their name have been renamed to follow our style-guide. The old name still exists as a deprecated alias.

• Changed CallNode.getArgByName such that it has results for keyword arguments given after a dictionary unpacking argument, as the bar=2 argument in func(foo=1, **kwargs, bar=2).
• getStarArg member-predicate on Call and CallNode has been changed for calls that have multiple *args arguments (for example func(42, *my_args, *other_args)): Instead of producing no results, it will always have a result for the first such *args argument.
• Reads of global/non-local variables (without annotations) inside functions defined on classes now works properly in the case where the class had an attribute defined with the same name as the non-local variable.

• Fixed an issue in the taint tracking analysis where implicit reads were not allowed by default in sinks or additional taint steps that used flow states.

• Many classes/predicates/modules with upper-case acronyms in their name have been renamed to follow our style-guide. The old name still exists as a deprecated alias.
• The utility files previously in the semmle.python.security.performance package have been moved to the semmle.python.security.regexp package.
  The previous files still exist as deprecated aliases.

• Most deprecated predicates/classes/modules that have been deprecated for over a year have been deleted.

• Change .getASubclass() on API::Node so it allows to follow subclasses even if the class has a class decorator.

• The documentation of API graphs (the API module) has been expanded, and some of the members predicates of API::Node have been renamed as follows:
  • getAnImmediateUse -> asSource
  • getARhs -> asSink
  • getAUse -> getAValueReachableFromSource
  • getAValueReachingRhs -> getAValueReachingSink

• Improved modeling of sensitive data sources, so common words like certain and secretary are no longer considered a certificate and a secret (respectively).

• The BarrierGuard class has been deprecated. Such barriers and sanitizers can now instead be created using the new BarrierGuard parameterized module.

• API::moduleImport no longer has any results for dotted names, such as API::moduleImport("foo.bar"). Using API::moduleImport("foo.bar").getMember("baz").getACall() previously worked if the Python code was from foo.bar import baz; baz(), but not if the code was import foo.bar; foo.bar.baz() -- we are making this change to ensure the approach that can handle all cases is always used.

• The imports made available from import python are no longer exposed under DataFlow:: after doing import semmle.python.dataflow.new.DataFlow, for example using DataFlow::Add will now cause a compile error.

• The modeling of request.files in Flask has been fixed, so we now properly handle assignments to local variables (such as files = request.files; files['key'].filename).
• Added taint propagation for io.StringIO and io.BytesIO. This addition was originally Random Post Off Shore.

• The signature of allowImplicitRead on DataFlow::Configuration and TaintTracking::Configuration has changed from allowImplicitRead(DataFlow::Node node, DataFlow::Content c) to allowImplicitRead(DataFlow::Node node, DataFlow::ContentSet c).

• The recently added flow-state versions of isBarrierIn, isBarrierOut, isSanitizerIn, and isSanitizerOut in the data flow and taint tracking libraries have been removed.

• Queries importing a data-flow configuration from semmle.python.security.dataflow should ensure that the imported file ends with Query, and only import its top-level module. For example, a query that used CommandInjection::Configuration from semmle.python.security.dataflow.CommandInjection should from now use Configuration from semmle.python.security.dataflow.CommandInjectionQuery instead.

• Added data-flow for Django ORM models that are saved in a database (no models.ForeignKey support).

• Improved modeling of Flask Response objects, so passing a response body with the keyword argument response is now recognized.

• The flow state variants of isBarrier and isAdditionalFlowStep are no longer exposed in the taint tracking library. The isSanitizer and isAdditionalTaintStep predicates should be used instead.

• Many classes/predicates/modules that had upper-case acronyms have been renamed to follow our style-guide. The old name still exists as a deprecated alias.
• Some modules that started with a lowercase letter have been renamed to follow our style-guide. The old name still exists as a deprecated alias.

• The data flow and taint tracking libraries have been extended with versions of isBarrierIn, isBarrierOut, and isBarrierGuard, respectively isSanitizerIn, isSanitizerOut, and isSanitizerGuard, that support flow states.

• All deprecated predicates/classes/modules that have been deprecated for over a year have been deleted.

• Added new SSRF sinks for httpx, pycurl, urllib, urllib2, urllib3, and libtaxii. This improvement was Best Homepage Layout For Physical Products.
• The regular expression parser now groups sequences of normal characters. This reduces the number of instances of RegExpNormalChar.
• Fixed taint propagation for attribute assignment. In the assignment x.foo = tainted we no longer treat the entire object x as tainted, just because the attribute foo contains tainted data. This leads to slightly fewer false positives.
• Improved analysis of attributes for data-flow and taint tracking queries, so getattr/setattr are supported, and a write to an attribute properly stops flow for the old value in that attribute.
• Added post-update nodes (DataFlow::PostUpdateNode) for arguments in calls that can't be resolved.

• The old points-to based modeling has been deprecated. Use the new type-tracking/API-graphs based modeling instead.

• Moved the files defining regex injection configuration and customization, instead of import semmle.python.security.injection.RegexInjection please use import semmle.python.security.dataflow.RegexInjection (the same for RegexInjectionCustomizations).
• The codeql/python-upgrades CodeQL pack has been removed. All upgrades scripts have been merged into the codeql/python-all CodeQL pack.

• Added modeling of many functions from the os module that uses file system paths, such as os.stat, os.chdir, os.mkdir, and so on.
• Added modeling of the tempfile module for creating temporary files and directories, such as the functions tempfile.NamedTemporaryFile and tempfile.TemporaryDirectory.
• Extended the modeling of FastAPI such that custom subclasses of fastapi.APIRouter are recognized.
• Extended the modeling of FastAPI such that fastapi.responses.FileResponse are considered FileSystemAccess.
• Added modeling of the posixpath, ntpath, and genericpath modules for path operations (although these are not supposed to be used), resulting in new sinks.
• Added modeling of wsgiref.simple_server applications, leading to new remote flow sources.

• Added modeling of os.stat, os.lstat, os.statvfs, os.fstat, and os.fstatvfs, which are new sinks for the Uncontrolled data used in path expression (py/path-injection) query.
• Added modeling of the posixpath, ntpath, and genericpath modules for path operations (although these are not supposed to be used), resulting in new sinks for the Uncontrolled data used in path expression (py/path-injection) query.
• Added modeling of wsgiref.simple_server applications, leading to new remote flow sources.
• Added modeling of aiopg for sinks executing SQL.
• Added modeling of HTTP requests and responses when using flask_admin (Flask-Admin PyPI package), which leads to additional remote flow sources.
• Added modeling of the PyPI package toml, which provides encoding/decoding of TOML documents, leading to new taint-tracking steps.