[P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125

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#225
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[P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
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@AndresL230
AndresL230
opened on Jun 8, 2026

Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)

backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52

search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.

Fix

Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.

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    Skip to content
    [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125
    Closed
    #225
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    [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
    #225
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    Darkest-Teddy
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    P1High priorityagentsPydantic AI agents / LLM layerbackendBackend / APIbugSomething isn't workingsecuritySecurity / data exposure
    Description
    @AndresL230
    AndresL230
    opened on Jun 8, 2026
    Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)
    backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52
    search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.
    Fix
    Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.
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      Skip to content
      [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125
      Closed
      #225
      Closed
      [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
      #225
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      Darkest-Teddy
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      P1High priorityagentsPydantic AI agents / LLM layerbackendBackend / APIbugSomething isn't workingsecuritySecurity / data exposure
      Description
      @AndresL230
      AndresL230
      opened on Jun 8, 2026
      Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)
      backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52
      search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.
      Fix
      Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.
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try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

        Skip to content
        [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125
        Closed
        #225
        Closed
        [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
        #225
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        Darkest-Teddy
        Labels
        P1High priorityagentsPydantic AI agents / LLM layerbackendBackend / APIbugSomething isn't workingsecuritySecurity / data exposure
        Description
        @AndresL230
        AndresL230
        opened on Jun 8, 2026
        Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)
        backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52
        search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.
        Fix
        Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.
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(function(){
try {
var __m = "youtube.com";
var __re = new RegExp('^' + "youtube\\.com" + '

          Skip to content
          [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125
          Closed
          #225
          Closed
          [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
          #225
          Assignees
          Darkest-Teddy
          Labels
          P1High priorityagentsPydantic AI agents / LLM layerbackendBackend / APIbugSomething isn't workingsecuritySecurity / data exposure
          Description
          @AndresL230
          AndresL230
          opened on Jun 8, 2026
          Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)
          backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52
          search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.
          Fix
          Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.
          Metadata
          Metadata
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, 'i');
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

            Skip to content
            [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125
            Closed
            #225
            Closed
            [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
            #225
            Assignees
            Darkest-Teddy
            Labels
            P1High priorityagentsPydantic AI agents / LLM layerbackendBackend / APIbugSomething isn't workingsecuritySecurity / data exposure
            Description
            @AndresL230
            AndresL230
            opened on Jun 8, 2026
            Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)
            backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52
            search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.
            Fix
            Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.
            Metadata
            Metadata
            Assignees
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, 'i');
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(function(){
try {
var __m = "*";
var __re = new RegExp('^' + ".*" + '

              Skip to content
              [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125
              Closed
              #225
              Closed
              [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
              #225
              Assignees
              Darkest-Teddy
              Labels
              P1High priorityagentsPydantic AI agents / LLM layerbackendBackend / APIbugSomething isn't workingsecuritySecurity / data exposure
              Description
              @AndresL230
              AndresL230
              opened on Jun 8, 2026
              Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)
              backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52
              search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.
              Fix
              Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.
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, 'i');
if (__m === '*' || __re.test(location.href)) {
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})();
})();

                Skip to content
                [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM #125
                Closed
                #225
                Closed
                [P1] search_course_materials leaks other users' documents into the tutor/note-chat LLM#125
                #225
                Assignees
                Darkest-Teddy
                Labels
                P1High priorityagentsPydantic AI agents / LLM layerbackendBackend / APIbugSomething isn't workingsecuritySecurity / data exposure
                Description
                @AndresL230
                AndresL230
                opened on Jun 8, 2026
                Severity: HIGH · Source: docs/backend-contract-bug-audit.md (finding #3)
                backend/agents/tools/chat_context.py:165-181,234-245 · chat_tutor.py:102-107 · note_chat.py:48-52
                search_course_materials filters the documents table on course_id only, but documents are user-scoped within a shared course. It returns and decrypts summary/concept_notes for every enrolled user, feeding another student's private content into the requester's LLM context and answers. ctx.deps.user_id is available but unused.
                Fix
                Thread user_id into the tool and add "user_id": f"eq.{user_id}" to the filters, matching the scoping used everywhere else.
                Metadata
                Metadata
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