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4 vulnerabilities by graphql-python
CVE-2026-75508 (GCVE-0-2026-75508)
Vulnerability from nvd – Published: 2026-10-22 16:10 – Updated: 2026-10-22 16:10
VLAI
EPSS
VEX
Title
GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit
Summary
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.
Severity
7.5 (High)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/graphql-python/graphql-core/se… | x_refsource_CONFIRM |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| graphql-python | graphql-core |
Affected:
>= 3.2.3, < 3.2.12
Affected: >= 3.3.0a3, < 3.3.0rc1 |
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CVE-2026-75507 (GCVE-0-2026-75507)
Vulnerability from nvd – Published: 2026-10-22 16:12 – Updated: 2026-10-23 21:08
VLAI
EPSS
VEX
Title
GraphQL-core: Denial of service via quadratic complexity in the OverlappingFieldsCanBeMerged validation rule
Summary
GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.0.0 until 3.2.12 and 3.3.0rc1, the OverlappingFieldsCanBeMerged rule in specified_rules repeatedly compares fields that share response names and recursively re-compares flattened inline fragments during the validation phase. The prior named-fragment memoization does not cover this path, so nested repeated inline fragments can drive quadratic and worst-case O(n²·m²) CPU work before any resolver or AST-based depth or complexity control runs. An unauthenticated remote attacker can submit a shallow, highly compressible GraphQL query that pins a worker process and can saturate a multi-worker service. This issue is fixed in versions 3.2.12 and 3.3.0rc1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 17:32 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/graphql-python/graphql-core/se… | x_refsource_CONFIRM |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| graphql-python | graphql-core |
Affected:
>= 3.0.0, < 3.2.12
Affected: >= 3.3.0a1, < 3.3.0rc1 |
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CVE-2026-75507 (GCVE-0-2026-75507)
Vulnerability from cvelistv5 – Published: 2026-10-22 16:12 – Updated: 2026-10-23 21:08
VLAI
EPSS
VEX
Title
GraphQL-core: Denial of service via quadratic complexity in the OverlappingFieldsCanBeMerged validation rule
Summary
GraphQL-core is a Python port of the GraphQL.js reference implementation. From 3.0.0 until 3.2.12 and 3.3.0rc1, the OverlappingFieldsCanBeMerged rule in specified_rules repeatedly compares fields that share response names and recursively re-compares flattened inline fragments during the validation phase. The prior named-fragment memoization does not cover this path, so nested repeated inline fragments can drive quadratic and worst-case O(n²·m²) CPU work before any resolver or AST-based depth or complexity control runs. An unauthenticated remote attacker can submit a shallow, highly compressible GraphQL query that pins a worker process and can saturate a multi-worker service. This issue is fixed in versions 3.2.12 and 3.3.0rc1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-23 17:32 UTC
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/graphql-python/graphql-core/se… | x_refsource_CONFIRM |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| graphql-python | graphql-core |
Affected:
>= 3.0.0, < 3.2.12
Affected: >= 3.3.0a1, < 3.3.0rc1 |
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CVE-2026-75508 (GCVE-0-2026-75508)
Vulnerability from cvelistv5 – Published: 2026-10-22 16:10 – Updated: 2026-10-22 16:10
VLAI
EPSS
VEX
Title
GraphQL-core: Denial of service via comment tokens bypassing the parser's max_tokens limit
Summary
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.
Severity
7.5 (High)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://github.com/graphql-python/graphql-core/se… | x_refsource_CONFIRM |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/co… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
| https://github.com/graphql-python/graphql-core/re… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| graphql-python | graphql-core |
Affected:
>= 3.2.3, < 3.2.12
Affected: >= 3.3.0a3, < 3.3.0rc1 |
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