CVE-2026-77604 — Code Graph RAG: MCP paginated read_file path traversal / arbitrary file read

Exploitation evidence

Not listed in the latest downloaded CISA KEV catalog. This does not establish an absence of exploitation.

KEV checked 13 Nov 2026, 00:20 Jerusalem · Original catalog ↗

Reported products and versions

vitali87 / code-graph-rag

Default status: Not specified

affected: < 0.0.345

Fixes and workarounds

No explicit solution text in the downloaded CVE record. Consult the vendor advisory; unaffected version ranges are shown above as reported, not inferred as a patch recommendation.

Sources and related reporting

CVE Program record ↗ · Download tracked evidence as JSON

Monitored source mentions

GitHub Advisory Database — Code Graph RAG: MCP paginated read_file path traversal / arbitrary file read ↗

Shared CVE identifiers link source mentions; they do not establish that the reports describe the same incident.

Reviewed Egret reports

Paginated file-read tool lets attackers escape the project folder and read any server file

Observed change timeline

History begins when Egret first downloads each source. It is not the complete upstream CVE history.

12 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-12",
  "epss": 0.00391,
  "percentile": 0.33737
}

10 Nov 2026, 18:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-10",
  "epss": 0.00391,
  "percentile": 0.33582
}

10 Nov 2026, 12:20 Jerusalem · EPSS observation updated

Stored EPSS snapshot at this observation.

{
  "date": "2026-11-09",
  "epss": 0.00383,
  "percentile": 0.32576
}

10 Nov 2026, 12:20 Jerusalem · CVE Program record changed

Stored CNA snapshot at this observation.

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-77604",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-11-09T22:50:42.309586Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-11-09T22:51:03.789Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "references": [
          {
            "tags": [
              "exploit"
            ],
            "url": "https://github.com/openemr/openemr/security/advisories/GHSA-5h9g-m7q2-pv45"
          }
        ],
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "code-graph-rag",
          "vendor": "vitali87",
          "versions": [
            {
              "status": "affected",
              "version": "< 0.0.345"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Code Graph RAG is an AI-powered knowledge graph and retrieval system for querying, understanding, and editing multi-language codebases. Prior to 0.0.345, the MCPToolsRegistry.read_file implementation in codebase_rag/mcp/tools.py joins attacker-controlled file_path input to project_root without resolving and verifying containment when offset or limit selects the paginated branch. An absolute path causes pathlib to discard the configured root, while relative traversal can also resolve outside it. The protected non-paginated branch uses validate_project_path, but the paginated branch bypasses that validation before opening the path. An unauthenticated caller of a network-exposed HTTP MCP server can therefore read arbitrary UTF-8-readable files available to the server process, including credentials, environment data, private keys, source, and configuration; local callers through the stdio transport can reach the same vulnerable code path. This issue is fixed in version 0.0.345."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-22",
              "description": "CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-11-05T20:10:19.957Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/vitali87/code-graph-rag/security/advisories/GHSA-vvr2-h2jp-838m",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/vitali87/code-graph-rag/security/advisories/GHSA-vvr2-h2jp-838m"
        },
        {
          "name": "https://github.com/vitali87/code-graph-rag/commit/6541e920a27961fa8f3ff49ef38c0e0bd09cd626",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vitali87/code-graph-rag/commit/6541e920a27961fa8f3ff49ef38c0e0bd09cd626"
        },
        {
          "name": "https://github.com/vitali87/code-graph-rag/releases/tag/v0.0.345",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/vitali87/code-graph-rag/releases/tag/v0.0.345"
        }
      ],
      "source": {
        "advisory": "GHSA-vvr2-h2jp-838m",
        "discovery": "UNKNOWN"
      },
      "title": "Code Graph RAG: MCP paginated read_file path traversal / arbitrary file read"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-77604",
    "datePublished": "2026-11-05T20:10:19.957Z",
    "dateReserved": "2026-08-20T20:48:20.507Z",
    "dateUpdated": "2026-11-09T22:51:03.789Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}