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Add nosql taint type and mark MongoDB sinks - #11944
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Add a new `nosql` taint type (part of the input taint class) and the corresponding `TaintedNosql` issue. Mark the appropriate MongoDB driver parameters as `nosql` sinks in the extension stub: - MongoDB\Driver\Query::__construct $filter - MongoDB\Driver\Command::__construct $document - MongoDB\Driver\BulkWrite::insert/update/delete filter and document params Co-Authored-By: Claude Opus 4.8
A plain string can never be a NoSQL query, so the nosql taint is now stripped from string-typed values (via getTaintsToRemove) - casting user input to string escapes it. Add concrete injection examples, an escape function example (@psalm-taint-escape nosql) and a minimal MongoDB\Driver\Manager stub so the documentation example is runnable. Co-Authored-By: Claude Opus 4.8
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Addresses review feedback: casting an inner value to string inside an array filter (e.g. new Query(["username" => (string) $_GET["username"]])) now actually removes the nosql taint, matching the documented safe pattern. Casting to string is escapes any array-only taint via getTaintsToRemove(). Also makes the sanitize_mongo_filter example a concrete sanitizer that forces filter values to scalars. Co-Authored-By: Claude Opus 4.8
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The previous attempt to strip nosql on every string cast rerouted all string-cast taint flows through an extra graph node, changing every taint graph / SARIF snapshot (and adding noise to unrelated html/sql flows). Instead rely on the existing sink-boundary stripping (getTaintsToRemove): a string-typed argument reaching a nosql sink is not reported. For array filters, the documented escape is a sanitizer annotated @psalm-taint-escape nosql. Docs and tests updated to match this actual behavior. Co-Authored-By: Claude Opus 4.8
This reverts commit ef39444.
…hots Restoring the string-cast nosql escaping (per review), but scoped to the taint flow graph only so the variable-use graph - and therefore unused variable/reference analysis and Psalm self-analysis - is unaffected. Casting to string now inserts a pass-through "string-cast" node on the taint graph that drops array-only taints (nosql). Updated the affected taint-path snapshots: TaintTest path strings, the taint graph dump fixture, and the SARIF report fixture. Co-Authored-By: Claude Opus 4.8
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Adding the string-cast pass-through node only to the taint graph while rerouting the value's parent_nodes broke variable-use tracking (the chain pointed at a node absent from the variable-use graph), causing false unused variable reports and a PossiblyNullReference in self-analysis. Add it to the active data-flow graph instead: the flow chain stays intact in both modes, and removed_taints only takes effect for taint analysis. Co-Authored-By: Claude Opus 4.8
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(int)/(float)/(bool) casts now route their value through a taint pass-through node (like (string) already did), removing every taint that cannot survive the target scalar while preserving those a scalar can still carry (e.g. sleep on numerics). This runs consistently in taint-only, variable-use-only and combined analysis modes, fixing both a false negative (sleep((int) $_GET[...]) was silently untainted) and a false positive (a value cast to a scalar inside an array no longer flags nosql/sql). Union::getTaintsToRemove() drops its isSingle() guard so literal unions such as int(0)|int(1) produced by casting a bool are handled too; isInt()/isString() already require every atomic member to match. Add TaintTest coverage for taints correctly stripped by each numeric cast and for taints that must survive (sleep through int/float, sql through string), and document that any scalar cast escapes nosql. Co-Authored-By: Claude Opus 4.8
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…e-master
master's new CustomTaintCacheTest used 'nosql'/'nosql-json' as sample
*custom* taint names, but this branch promotes 'nosql' to a builtin
TaintKind, so getOrRegisterTaint('nosql') now returns the builtin bit
instead of a freshly-assigned custom bit. Rename the sample custom
taints to 'graphql'/'graphql-json' (deliberately not builtin) so the
test keeps exercising custom-taint registration/caching.
Co-Authored-By: Claude Opus 4.8
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Add nosql taint type and mark MongoDB sinks
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Summary
Adds a new
nosqltaint type (part of theinputtaint class) and marks the appropriate MongoDB driver parameters as sinks, so user-controlled data flowing into a MongoDB query/command/filter is reported.This is the
master(bitmask taint design) counterpart of #11943 (which targets6.x).Changes
TaintKind::INPUT_NOSQL, added toALL_INPUTandTAINT_NAMES(USER_SECRET/SYSTEM_SECRETbits shifted up to keepALL_INPUTcontiguous;BUILTIN_TAINT_COUNTbumped to 20).TaintedNosqlissue (shortcode 369), wired intoTaintFlowGraphandconfig.xsd.stringcan never be a NoSQL query, sogetTaintsToRemove()stripsnosqlfrom string-typed values — casting user input tostringacts as a natural escape (newTaintKind::ARRAY_ONLY, mirroring the existingNUMERIC_ONLY/BOOL_ONLYdesign forsleep).stubs/extensions/mongodb.phpstub:MongoDB\Driver\Query::__construct$filterMongoDB\Driver\Command::__construct$documentMongoDB\Driver\BulkWrite::insert/update/deletefilter and document paramsMongoDB\Driver\Managerso the documented example is runnable.TaintedNosql.mdwith concrete injection examples and safe alternatives (cast to string,@psalm-taint-escape nosql), plus positive/negative test coverage inTaintTest.Test plan
vendor/bin/phpunit tests/TaintTest.phpvendor/bin/phpunit tests/DocumentationTest.php🤖 Generated with Claude Code