Read the docs
TI-2026-56298 Aliases CVE-2026-81636

Query-complexity limit bypass via first/last pagination arguments in AshGraphql enables denial of service

Priority HIGH 77CWE-770Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-770.

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.0055 46th percentileScored 2026-11-07
Fix Fixed ash_graphql (ash-project): 1.11.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
ash-projectash_graphql0.16.23 to before 1.11.01.11.0Patch availableCNA
  • ash_graphql Vendorash-project Affected 0.16.23 to before 1.11.0 Fixed in 1.11.0 Patch available CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:ash-project:ash_graphql:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

  • Fix · CNA ash_graphql (ash-project) Fixed in 1.11.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    ash-project ash_graphql 1.11.0

    6 records Highest priority Priority HIGH 3 HIGH, 3 MEDIUM

    Other records, highest priority first

    • TI-2026-56295 Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segmentPriority HIGH 70
    • TI-2026-54700 Incomplete redaction re-attaches the original error path in AshGraphql, leaking internal field namesPriority HIGH 70
    • TI-2026-55458 Cross-tenant subscription disclosure in AshGraphql authorizes notifications in memory without a tenant-scoped readPriority MEDIUM 64
    Show all 6 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-81636

References

Patch 1

Advisory 1

Other 2

  • TI-2026-52572 Unbounded atom creation from client-supplied RPC field names in AshTypescript field formatter CVSS 4.0HIGH 8.7
  • TI-2026-57010 Path traversal in AshAdmin file uploads via unsanitized client filename CVSS 4.0HIGH 8.3
  • TI-2026-26840 Ash Framework: Ash.Type.Module.cast_input/2 atom exhaustion via unchecked Module.concat allows BEAM VM crash CVSS 4.0HIGH 8.2
  • TI-2026-54252 EEx template evaluation of prompt content in AshAi enables remote code execution CVSS 4.0HIGH 8.9
  • TI-2026-54208 Stored XSS in AshAdmin relationship typeahead via unescaped label_field content CVSS 4.0HIGH 8.4
  • TI-2026-56295 Unhandled KeyError in AshGraphql relay node resolution crashes queries via an unknown type segment CVSS 4.0MEDIUM 6.9
See all 90 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences