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CVE-2026-77856: CWE-770 Allocation of Resources Without Limits or Throttling in ash-project ash_typescript

0
High
VulnerabilityCVE-2026-77856cvecve-2026-77856cwe-770
Published: 09/01/2026 (09/01/2026, 02:08:46 UTC)
Source: CVE Database V5
Vendor/Project: ash-project
Product: ash_typescript

Description

Allocation of Resources Without Limits or Throttling vulnerability in ash-project ash_typescript allows an unauthenticated attacker to exhaust the BEAM atom table and abort the node via client-supplied typed struct field names. resolve_typed_struct_field/2 in lib/ash_typescript/rpc/field_processing/field_selector.ex looks a client-supplied field name up in the typed struct's reverse map and, when it finds no match, falls back to String.to_atom/1. Because this runs before any field-existence check, an unresolvable name mints a permanent atom rather than being rejected as unknown. Atoms are never garbage collected, so a request carrying many distinct names on a typed struct field grows the atom table until the VM aborts at its limit. This issue affects ash_typescript: from 0.11.0 before 0.18.0.

CVSS v4.0

Score 8.2high

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
None
Vuln. Integrity
None
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Affected software

ash_typescript
pkg:hex/ash_typescript
Affected versions
>=0.11.0 <0.18.0
GitHub Actionsmore threats →cve
ash-project/ash_typescript
pkg:github/ash-project/ash_typescript
CPE configurations
cpe:2.3:a:ash-project:ash_typescript:*:*:*:*:*:*:*:*

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Technical Details

Data Version
5.2
Assigner Short Name
EEF
Date Reserved
2026-08-30T17:30:01.406Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a963a79acd9273b491bc8c1

Added to database: 09/01/2026, 02:37:45 UTC

Last updated: 09/01/2026, 03:22:04 UTC

Views: 4

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