{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "range": [
                  {
                    "introduced": "3.2.3"
                  },
                  {
                    "fixed": "3.2.12"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "introduced": "3.3.0a3"
                  },
                  {
                    "fixed": "3.3.0rc1"
                  }
                ],
                "source": "AFFECTED_FIELD",
                "strategy": "StringRangeExpression"
              },
              {
                "range": [
                  {
                    "fixed": "437dea102e92fdf05a2971ca76787c5a5bad875a"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "range": [
                  {
                    "fixed": "80ef435a1808fbbcc4aaac63ae76771a1c91002d"
                  }
                ],
                "source": "REFERENCES_COMMIT"
              },
              {
                "original_tag": "v3.2.12",
                "range": [
                  {
                    "fixed": "af6addb1bf39e3b111ae7b805d774326a02f1079"
                  }
                ],
                "source": "REFERENCES_TAG"
              },
              {
                "original_tag": "v3.3.0rc1",
                "range": [
                  {
                    "fixed": "2d72d39ce7107226b9bcd5cc47835a19da0c2c87"
                  }
                ],
                "source": "REFERENCES_TAG"
              }
            ]
          },
          "events": [
            {
              "introduced": "430ee891a52d239adadf133d873fdca2a3fe009b"
            },
            {
              "fixed": "af6addb1bf39e3b111ae7b805d774326a02f1079"
            },
            {
              "introduced": "f7e937ca298d90bca74cc1c90904f585c516a0bb"
            },
            {
              "fixed": "2d72d39ce7107226b9bcd5cc47835a19da0c2c87"
            },
            {
              "fixed": "437dea102e92fdf05a2971ca76787c5a5bad875a"
            },
            {
              "fixed": "80ef435a1808fbbcc4aaac63ae76771a1c91002d"
            }
          ],
          "repo": "https://github.com/graphql-python/graphql-core",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-r77w-qph3-7vf8"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-400",
      "CWE-770"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75508.json"
  },
  "details": "GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.2.3 until 3.2.12 and 3.3.0rc1, the parser's max_tokens limit in Parser.advance_lexer counts only non-comment tokens returned after Lexer.lookahead skips comments. Each skipped comment is still allocated as a Token and retained through token.next and token.prev, allowing a highly compressible comment-padded GraphQL document to pass a low token limit while consuming memory. An unauthenticated remote attacker can exhaust worker memory before AST-based depth or complexity controls run. This issue is fixed in versions 3.2.12 and 3.3.0rc1.",
  "id": "CVE-2026-75508",
  "modified": "2026-10-23T02:30:42.888299250Z",
  "published": "2026-10-22T16:10:17.124Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/75xxx/CVE-2026-75508.json"
    },
    {
      "type": "FIX",
      "url": "https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a"
    },
    {
      "type": "FIX",
      "url": "https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d"
    },
    {
      "type": "WEB",
      "url": "https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12"
    },
    {
      "type": "WEB",
      "url": "https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75508"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit"
}