CVE-2026-75508

{
  "id": "CVE-2026-75508",
  "sourceIdentifier": "[email protected]",
  "published": "2026-10-22T17:16:59.933",
  "lastModified": "2026-10-29T12:17:13.617",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "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."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "graphql-python",
          "product": "graphql-core",
          "versions": [
            {
              "version": ">= 3.2.3, < 3.2.12",
              "status": "affected"
            },
            {
              "version": ">= 3.3.0a3, < 3.3.0rc1",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-10-29T11:46:36.041252Z",
          "id": "CVE-2026-75508",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/graphql-python/graphql-core/commit/437dea102e92fdf05a2971ca76787c5a5bad875a",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/graphql-python/graphql-core/commit/80ef435a1808fbbcc4aaac63ae76771a1c91002d",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/graphql-python/graphql-core/releases/tag/v3.2.12",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/graphql-python/graphql-core/releases/tag/v3.3.0rc1",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/graphql-python/graphql-core/security/advisories/GHSA-r77w-qph3-7vf8",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}