{"containers":{"cna":{"affected":[{"collectionURL":"https://repo.hex.pm","cpes":["cpe:2.3:a:absinthe-graphql:absinthe:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames'"],"packageName":"absinthe","packageURL":"pkg:hex/absinthe","product":"absinthe","programFiles":["lib/absinthe/phase/document/validation/unique_fragment_names.ex"],"programRoutines":[{"name":"'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames':run/2"},{"name":"'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames':duplicate?/2"}],"repo":"https://github.com/absinthe-graphql/absinthe","vendor":"absinthe-graphql","versions":[{"lessThan":"1.10.2","status":"affected","version":"1.2.0","versionType":"semver"}]},{"collectionURL":"https://github.com","cpes":["cpe:2.3:a:absinthe-graphql:absinthe:*:*:*:*:*:*:*:*"],"defaultStatus":"unaffected","modules":["'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames'"],"packageName":"absinthe-graphql/absinthe","packageURL":"pkg:github/absinthe-graphql/absinthe","product":"absinthe","programFiles":["lib/absinthe/phase/document/validation/unique_fragment_names.ex"],"programRoutines":[{"name":"'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames':run/2"},{"name":"'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames':duplicate?/2"}],"repo":"https://github.com/absinthe-graphql/absinthe","vendor":"absinthe-graphql","versions":[{"lessThan":"223600c520493dcaf95080af552c413099f92c9d","status":"affected","version":"0b46e3bcc06c0d3797bacd64761b908a84646c1d","versionType":"git"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:absinthe-graphql:absinthe:*:*:*:*:*:*:*:*","versionEndExcluding":"1.10.2","versionStartIncluding":"1.2.0","vulnerable":true}],"negate":false,"operator":"OR"}],"operator":"AND"}],"credits":[{"lang":"en","type":"finder","value":"Peter Ullrich"},{"lang":"en","type":"remediation developer","value":"Curtis Schiewek"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"Inefficient Algorithmic Complexity vulnerability in absinthe-graphql absinthe allows unauthenticated denial of service via quadratic fragment-name uniqueness validation.<p><tt>'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames':run/2</tt> iterates over all fragments and for each one calls <tt>duplicate?/2</tt>, which evaluates <tt>Enum.count(fragments, &amp;(&amp;1.name == name))</tt> — a full linear scan of the fragment list. The result is O(N²) comparisons per document, where N is the number of fragment definitions supplied by the caller.</p><p>Because <tt>input.fragments</tt> is built directly from the GraphQL query body, N is fully attacker-controlled. A minimum-size fragment definition is roughly 16 bytes, so a ~1 MB document carries ~60,000 fragments and forces ~3.6 × 10⁹ comparisons inside this single validation phase. No authentication, schema knowledge, or special configuration is required.</p><p>This issue affects absinthe: from 1.2.0 before 1.10.2.</p>"}],"value":"Inefficient Algorithmic Complexity vulnerability in absinthe-graphql absinthe allows unauthenticated denial of service via quadratic fragment-name uniqueness validation.\n\n'Elixir.Absinthe.Phase.Document.Validation.UniqueFragmentNames':run/2 iterates over all fragments and for each one calls duplicate?/2, which evaluates Enum.count(fragments, &(&1.name == name)) — a full linear scan of the fragment list. The result is O(N²) comparisons per document, where N is the number of fragment definitions supplied by the caller.\n\nBecause input.fragments is built directly from the GraphQL query body, N is fully attacker-controlled. A minimum-size fragment definition is roughly 16 bytes, so a ~1 MB document carries ~60,000 fragments and forces ~3.6 × 10⁹ comparisons inside this single validation phase. No authentication, schema knowledge, or special configuration is required.\n\nThis issue affects absinthe: from 1.2.0 before 1.10.2."}],"impacts":[{"capecId":"CAPEC-229","descriptions":[{"lang":"en","value":"CAPEC-229 Serialized Data Parameter Blowup"}]}],"metrics":[{"cvssV4_0":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":8.7,"baseSeverity":"HIGH","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-407","description":"CWE-407 Inefficient Algorithmic Complexity","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-05-08T15:42:34.347Z","orgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","shortName":"EEF"},"references":[{"tags":["vendor-advisory","related"],"url":"https://github.com/absinthe-graphql/absinthe/security/advisories/GHSA-9mhv-8h52-q7q2"},{"tags":["related"],"url":"https://cna.erlef.org/cves/CVE-2026-43967.html"},{"tags":["related"],"url":"https://osv.dev/vulnerability/EEF-CVE-2026-43967"},{"tags":["patch"],"url":"https://github.com/absinthe-graphql/absinthe/commit/223600c520493dcaf95080af552c413099f92c9d"}],"source":{"discovery":"EXTERNAL"},"title":"Quadratic fragment-name uniqueness check causes denial of service in absinthe","x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"6b3ad84c-e1a6-4bf7-a703-f496b71e49db","assignerShortName":"EEF","cveId":"CVE-2026-43967","datePublished":"2026-05-08T15:42:34.347Z","dateReserved":"2026-05-04T18:23:25.573Z","dateUpdated":"2026-05-08T15:42:34.347Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"}