🛡️ Sentinel: [DoS Protection] Add input length limit to version comparison

[google-labs-jules]

🛡️ Sentinel: [DoS Protection] Add input length limit to version comparison

Vulnerability:
The compareTo function split input strings and iterated over them without checking the length. Extremely long version strings (e.g., millions of characters) could be used to cause high CPU/memory usage (DoS).

Fix:

• Added MAX_VERSION_LENGTH constant (256 characters).
• Added a check at the start of compareTo to return NaN (which results in false for comparisons) if the input length exceeds the limit.
• This is a safe, fail-closed mechanism.

Verification:

• Added regression tests in src/security.test.ts to ensure long strings are rejected and valid long strings (within limit) are accepted.
• Ran full test suite.

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PR created automatically by Jules for task 3146843907473823444 started by @srod

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Summary by cubic

Added a 256-character input limit to version comparison to prevent DoS from extremely long version strings. Oversized inputs now fail closed so comparisons return false without heavy processing.

• Bug Fixes
  • Early return with NaN in compareTo when input exceeds the limit.
  • Added tests to reject oversized inputs and accept valid long ones.
  • Published a patch changeset for node-version.

^{Written for commit 9bec866. Summary will update on new commits.}

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[changeset-bot]

🦋 Changeset detected

Latest commit: 9bec866

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
node-version	Patch

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 100.00%. Comparing base (67d8793) to head (9bec866).

Additional details and impacted files

@@            Coverage Diff            @@
##              main      #815   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files            1         1           
  Lines           46        49    +3     
  Branches        16        17    +1     
=========================================
+ Hits            46        49    +3     

Flag	Coverage Δ
unittests	100.00% <100.00%> (ø)

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