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fix(security): resolve ReDoS vulnerability in function execute tag pattern #4149

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Merged
waleedlatif1 merged 4 commits into from
Apr 14, 2026
+4 −5
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fix(security): resolve ReDoS vulnerability in function execute tag pattern #4149

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6073770
fix(security): resolve ReDoS vulnerability in function execute tag pa…
waleedlatif1 Apr 14, 2026
28f3401
fix(security): exclude trailing-dot refs and hoist tag pattern to mod…
waleedlatif1 Apr 14, 2026
dc41251
fix(security): align tag pattern with codebase standard [^<>]+ pattern
waleedlatif1 Apr 14, 2026
4e21a08
refactor(security): use createReferencePattern() instead of inline regex
waleedlatif1 Apr 14, 2026
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2 changes: 1 addition & 1 deletion apps/sim/app/api/function/execute/route.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -494,7 +494,7 @@ function resolveTagVariables(
const undefinedLiteral = language === 'python' ? 'None' : 'undefined'

const tagPattern = new RegExp(
`${REFERENCE.START}([a-zA-Z_](?:[a-zA-Z0-9_${REFERENCE.PATH_DELIMITER}]*[a-zA-Z0-9_])?)${REFERENCE.END}`,
`${REFERENCE.START}([a-zA-Z_][a-zA-Z0-9_${REFERENCE.PATH_DELIMITER}]*)${REFERENCE.END}`,
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'g'
)
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const tagMatches = resolvedCode.match(tagPattern) || []
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