fix: Transactional batch request can roll back or block writes of other clients (GHSA-jhh9-hrgh-c9gv)

[mtrezza]

Issue

Transactional batch request can roll back or block writes of other clients (GHSA-jhh9-hrgh-c9gv)

Tasks

• Add tests
• Add changes to documentation (guides, repository pages, code comments)
• Add security check
• Add new Parse Error codes to Parse JS SDK

Summary by CodeRabbit

• Bug Fixes
  • Improved isolation between server configurations so loading or reloading a master key and applying server settings do not cause database operations to share controller state.
  • Transactional batches now prevent overlapping sessions from interfering. If starting a session fails, a later attempt can still proceed.
  • On supported MongoDB replica-set and PostgreSQL setups, writes from other clients remain available and persist when a transactional batch fails.

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ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Essentials

Run ID: 36c5eb4d-ee44-4d68-9d40-af00410b4b86

📥 Commits

Reviewing files that changed from the base of the PR and between 39ab1f0 and e62686e.

📒 Files selected for processing (2)

• spec/vulnerabilities.spec.js
• src/Controllers/DatabaseController.js

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📝 Walkthrough

Walkthrough

The changes update cached database-controller handling and prevent repeated or concurrent transactional-session creation. Regression tests cover configuration behavior, session-creation failures, and transactional batch behavior on supported database configurations.

Changes

Transactional Batch Isolation

Layer / File(s)	Summary
Database-controller configuration src/Config.js, spec/vulnerabilities.spec.js	Config.get creates a fresh controller from the cached database value. loadMasterKey updates masterKeyCache on the cached server config. Tests cover controller separation and related configuration behavior.
Transactional-session creation guard src/Controllers/DatabaseController.js, spec/vulnerabilities.spec.js	DatabaseController rejects session creation when a session exists or creation is pending. It clears the pending state after success or failure. Tests cover duplicate requests and retry after failure.
Transactional batch integration tests spec/vulnerabilities.spec.js	MongoDB replica-set and PostgreSQL tests cover overlapping batches, another client’s write during a failing batch, and writes after a failed batch.

Priority: ⬆️ High

Estimated code review effort: 3 (Moderate) | ~20 minutes

Merge Risk: ⚪ Minimal · up to e6268

The reviewed transaction paths do not show a remaining batch-isolation issue; this change is mergeable after normal checks.

🚥 Pre-merge checks | ✅ 7

✅ Passed checks (7 passed)

Check name	Status	Explanation
Title check	✅ Passed	The title begins with the allowed fix: prefix and clearly describes the transactional batch isolation issue addressed by the changes.
Description check	✅ Passed	The description identifies the issue and includes the task checklist. It omits the required ## Approach section and the standard ## Pull Request boilerplate, but it remains mostly complete and rel…
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check. Docstring coverage is scoped to functions touched by this diff. Analyzed 0 functions across 3…
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Security Check	✅ Passed	PASS. The changed source addresses the reported shared-state and transaction-isolation risk. Config.get now excludes cached request-scoped database and always creates a new DatabaseController; `…
Engage In Review Feedback	✅ Passed	Both supplied review threads were resolved, and CodeRabbit marked both findings as confirmed addressed. The feedback covered the two transactional batch rejection assertions and synchronous adapter th…

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🔧 ast-grep (0.45.3)

spec/vulnerabilities.spec.js

ast-grep timed out on this file

🔧 Biome (2.5.12)

src/Controllers/DatabaseController.js

File contains syntax errors that prevent linting: Line 18: 'import type' are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 19: 'import type' are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 20: 'import type' are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 73: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 74: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 75: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 76: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 77: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 77

... [truncated 20149 characters] ...

onvert your file to a TypeScript file or remove the syntax.; Line 2030: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 2030: return type annotation are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 2066: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 2066: Type annotations are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 2066: return type annotation are a TypeScript only feature. Convert your file to a TypeScript file or remove the syntax.; Line 2096: return types can only be used in TypeScript files; Line 2097: return types can only be used in TypeScript files

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 92.64%. Comparing base (726b1ea) to head (e62686e).
⚠️ Report is 1 commits behind head on release-8.x.x.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-8.x.x   #10716      +/-   ##
=================================================
+ Coverage          92.56%   92.64%   +0.07%     
=================================================
  Files                192      192              
  Lines              16291    16301      +10     
  Branches             238      238              
=================================================
+ Hits               15080    15102      +22     
+ Misses              1190     1178      -12     
  Partials              21       21              

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[mtrezza]

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[mtrezza]

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Actionable comments posted: 2

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• 🪄 Fix CodeRabbit comments on this PR

🤖 Prompt to fix review comments

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Inline comments:
Review comments at @spec/vulnerabilities.spec.js:
- Line 7078: Update both transactional batch tests in
spec/vulnerabilities.spec.js at lines 7078–7078 and 7113–7113: replace the
rejection-swallowing catch behavior with assertions that the batch rejects. At
7078–7078, assert rejection after the other client’s write and before checking
that the write survived; at 7113–7113, assert rejection before checking that a
later write succeeds.

Review comments at @src/Controllers/DatabaseController.js:
- Around line 1860-1862: Invoke createTransactionalSession from a promise-chain
callback in the session creation flow so synchronous adapter throws become
promise rejections and reach the existing finally handler, which clears the
pending flag.

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ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Essentials

Run ID: 2d2ecd0d-974b-40d4-b52f-0a819588d5c9

📥 Commits

Reviewing files that changed from the base of the PR and between f7b91ad and 39ab1f0.

📒 Files selected for processing (3)

• spec/vulnerabilities.spec.js
• src/Config.js
• src/Controllers/DatabaseController.js

Included review availability: This review used your included allowance. Your plan provides up to 10 included reviews per hour; 9 remain after this review.

[mtrezza]

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Comments resolved and changes approved.

[mtrezza]

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[parseplatformorg]

🎉 This change has been released in version 8.6.96