CVE-2026-81633 (GCVE-0-2026-81633)
Vulnerability from cvelistv5 – Published: 2026-08-30 18:22 – Updated: 2026-08-31 15:56
VLAI
EPSS
VEX
Title
Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segment
Summary
Improper Input Validation vulnerability in ash-project ash_graphql allows an unauthenticated client to crash a relay node(id: ...) query with an unhandled KeyError.
AshGraphql.Graphql.Resolver.resolve_node/2 decodes the client-supplied global ID with decode_relay_id/1, which only base64-decodes the string and splits it on : without validating the type segment. The decoded type is passed straight to Map.fetch!(type_to_domain_and_resource_map, type). Because fetch! raises on a missing key, a relay ID whose type segment is a valid atom that is not a relay-exposed type aborts the resolver before its resolve/2 clauses and their rescue handlers run, so the error never becomes a GraphQL error and may expose a stacktrace. Common resource names are easy to guess. The fix uses Map.fetch/2 and returns an Invalid node id error for unknown types.
This issue affects ash_graphql: from 0.27.0 before 1.11.0.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-31 15:55 UTC
CWE
- CWE-20 - Improper Input Validation
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash_graphql/securi… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-81633.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-81633 | related |
| https://github.com/ash-project/ash_graphql/commit… | patch |
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| ash-project | ash_graphql |
Affected:
0.27.0 , < 1.11.0
(semver)
cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:* |
||
| ash-project | ash_graphql |
Affected:
365b3aedc6b36f020e6a2c7dce63fa569243bc4e , < c8863ed8e5c21f1bfb6125f1d24e78443dfc6351
(git)
cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:* |
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"value": "\u003cp\u003eImproper Input Validation vulnerability in ash-project ash_graphql allows an unauthenticated client to crash a relay \u003ccode\u003enode(id: ...)\u003c/code\u003e query with an unhandled \u003ccode\u003eKeyError\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003e\u003ccode\u003eAshGraphql.Graphql.Resolver.resolve_node/2\u003c/code\u003e decodes the client-supplied global ID with \u003ccode\u003edecode_relay_id/1\u003c/code\u003e, which only base64-decodes the string and splits it on \u003ccode\u003e:\u003c/code\u003e without validating the type segment. The decoded type is passed straight to \u003ccode\u003eMap.fetch!(type_to_domain_and_resource_map, type)\u003c/code\u003e. Because \u003ccode\u003efetch!\u003c/code\u003e raises on a missing key, a relay ID whose type segment is a valid atom that is not a relay-exposed type aborts the resolver before its \u003ccode\u003eresolve/2\u003c/code\u003e clauses and their \u003ccode\u003erescue\u003c/code\u003e handlers run, so the error never becomes a GraphQL error and may expose a stacktrace. Common resource names are easy to guess. The fix uses \u003ccode\u003eMap.fetch/2\u003c/code\u003e and returns an \u003ccode\u003eInvalid node id\u003c/code\u003e error for unknown types.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash_graphql: from 0.27.0 before 1.11.0.\u003c/p\u003e"
},
{
"base64": false,
"type": "text/markdown",
"value": "Improper Input Validation vulnerability in ash-project ash_graphql allows an unauthenticated client to crash a relay `node(id: ...)` query with an unhandled `KeyError`.\n\n`AshGraphql.Graphql.Resolver.resolve_node/2` decodes the client-supplied global ID with `decode_relay_id/1`, which only base64-decodes the string and splits it on `:` without validating the type segment. The decoded type is passed straight to `Map.fetch!(type_to_domain_and_resource_map, type)`. Because `fetch!` raises on a missing key, a relay ID whose type segment is a valid atom that is not a relay-exposed type aborts the resolver before its `resolve/2` clauses and their `rescue` handlers run, so the error never becomes a GraphQL error and may expose a stacktrace. Common resource names are easy to guess. The fix uses `Map.fetch/2` and returns an `Invalid node id` error for unknown types.\n\nThis issue affects ash_graphql: from 0.27.0 before 1.11.0."
}
],
"value": "Improper Input Validation vulnerability in ash-project ash_graphql allows an unauthenticated client to crash a relay node(id: ...) query with an unhandled KeyError.\n\nAshGraphql.Graphql.Resolver.resolve_node/2 decodes the client-supplied global ID with decode_relay_id/1, which only base64-decodes the string and splits it on : without validating the type segment. The decoded type is passed straight to Map.fetch!(type_to_domain_and_resource_map, type). Because fetch! raises on a missing key, a relay ID whose type segment is a valid atom that is not a relay-exposed type aborts the resolver before its resolve/2 clauses and their rescue handlers run, so the error never becomes a GraphQL error and may expose a stacktrace. Common resource names are easy to guess. The fix uses Map.fetch/2 and returns an Invalid node id error for unknown types.\n\nThis issue affects ash_graphql: from 0.27.0 before 1.11.0."
}
],
"impacts": [
{
"capecId": "CAPEC-153",
"descriptions": [
{
"lang": "en",
"value": "CAPEC-153 Input Data Manipulation"
}
]
}
],
"metrics": [
{
"cvssV4_0": {
"Automatable": "NOT_DEFINED",
"Recovery": "NOT_DEFINED",
"Safety": "NOT_DEFINED",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"attackVector": "NETWORK",
"baseScore": 6.9,
"baseSeverity": "MEDIUM",
"privilegesRequired": "NONE",
"providerUrgency": "NOT_DEFINED",
"subAvailabilityImpact": "NONE",
"subConfidentialityImpact": "NONE",
"subIntegrityImpact": "NONE",
"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "NONE",
"vulnConfidentialityImpact": "LOW",
"vulnIntegrityImpact": "NONE",
"vulnerabilityResponseEffort": "NOT_DEFINED"
},
"format": "CVSS",
"scenarios": [
{
"lang": "en",
"value": "GENERAL"
}
]
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-20",
"description": "CWE-20 Improper Input Validation",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-08-30T18:22:07.096Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/ash-project/ash_graphql/security/advisories/GHSA-mrgv-g7gf-r96h"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-81633.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-81633"
},
{
"tags": [
"patch"
],
"url": "https://github.com/ash-project/ash_graphql/commit/c8863ed8e5c21f1bfb6125f1d24e78443dfc6351"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segment"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-81633",
"datePublished": "2026-08-30T18:22:07.096Z",
"dateReserved": "2026-08-30T17:15:01.281Z",
"dateUpdated": "2026-08-30T18:22:07.096Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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