CVE-2026-81636 (GCVE-0-2026-81636)
Vulnerability from cvelistv5
Published
2026-08-30 18:25
Modified
2026-08-30 18:25
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-770 - Allocation of Resources Without Limits or Throttling
Summary
Allocation of Resources Without Limits or Throttling vulnerability in ash-project ash_graphql allows an unauthenticated client to bypass the configured GraphQL query-complexity limit and force an unbounded database read.
AshGraphql.Graphql.Resolver.query_complexity/3 multiplies child complexity by the requested page size only when the argument map contains :limit (offset pagination). Relay connections and keyset pagination use first and last, which never match that clause and fall through to the catch-all that returns child_complexity + 1. A nested relay query such as posts(first: 500) { edges { node { comments(first: 500) { ... } } } } therefore scores as trivially cheap while materializing the full fan-out, passing an Absinthe max_complexity cap that rejects the equivalent limit-based query. The fix adds first and last clauses clamped to the action's page size.
This issue affects ash_graphql: from 0.16.23 before 1.11.0.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ash-project | ash_graphql |
Version: 0.16.23 ≤ cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:* |
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{
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"credits": [
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"type": "finder",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "reporter",
"value": "Peter Ullrich"
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{
"lang": "en",
"type": "remediation developer",
"value": "Zach Daniel / Ash Project"
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{
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"type": "coordinator",
"value": "Jonatan M\u00e4nnchen / EEF"
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"value": "Allocation of Resources Without Limits or Throttling vulnerability in ash-project ash_graphql allows an unauthenticated client to bypass the configured GraphQL query-complexity limit and force an unbounded database read.\n\n`AshGraphql.Graphql.Resolver.query_complexity/3` multiplies child complexity by the requested page size only when the argument map contains `:limit` (offset pagination). Relay connections and keyset pagination use `first` and `last`, which never match that clause and fall through to the catch-all that returns `child_complexity + 1`. A nested relay query such as `posts(first: 500) { edges { node { comments(first: 500) { ... } } } }` therefore scores as trivially cheap while materializing the full fan-out, passing an Absinthe `max_complexity` cap that rejects the equivalent `limit`-based query. The fix adds `first` and `last` clauses clamped to the action\u0027s page size.\n\nThis issue affects ash_graphql: from 0.16.23 before 1.11.0."
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"impacts": [
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"metrics": [
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"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
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"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 8.7,
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"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
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"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",
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"providerMetadata": {
"dateUpdated": "2026-08-30T18:25:29.776Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
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"references": [
{
"tags": [
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"related"
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"url": "https://github.com/ash-project/ash_graphql/security/advisories/GHSA-mwc4-r9fc-h6mg"
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{
"tags": [
"related"
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"url": "https://cna.erlef.org/cves/CVE-2026-81636.html"
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{
"tags": [
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-81636"
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"source": {
"discovery": "EXTERNAL"
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"title": "Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables denial of service"
}
},
"cveMetadata": {
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"cveId": "CVE-2026-81636",
"datePublished": "2026-08-30T18:25:29.776Z",
"dateReserved": "2026-08-30T02:00:02.143Z",
"dateUpdated": "2026-08-30T18:25:29.776Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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