CVE-2026-77856Public exploitNetwork attack vectorHinoki check available

Node abort via unbounded typed-field atom creation

Published Sep 1, 2026 · Updated Sep 1, 2026

Resource exhaustion in Ash Framework AshTypescript 0.11.0 through 0.17.3 allows remote attackers to abort the BEAM node over HTTP. resolve_typed_struct_field/2 converts each unmatched client-supplied typed-struct field name with String.to_atom/1 before checking whether the field exists, permanently consuming atom-table entries. Exploitation requires an exposed AshTypescript RPC endpoint and an Ash.TypedStruct-backed resource field; exhaustion interrupts every application on the node until restart.

CVSS severity8.2
High
EPSS probability0.32%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Resource exhaustion in Ash Framework AshTypescript 0.11.0 through 0.17.3 allows remote attackers to abort the BEAM node over HTTP. resolve_typed_struct_field/2 converts each unmatched client-supplied typed-struct field name with String.to_atom/1 before checking whether the field exists, permanently consuming atom-table entries. Exploitation requires an exposed AshTypescript RPC endpoint and an Ash.TypedStruct-backed resource field; exhaustion interrupts every application on the node until restart.

The record

CVE
CVE-2026-77856
Published
Sep 1, 2026
Updated
Sep 1, 2026
Vendor
Ash Framework
Product
AshTypescript
Classifications
CWE-770, CAPEC-130, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 1, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0.11.0 <0.18.0
  2. Affected versionversion=7c3d30896f2f9a54edea17e3787549776b1b288d <0ab5c83a7df28d51a6de1fb9b859a142b2b12919

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ash Framework · AshTypescriptversion=0.11.0 <0.18.0; version=7c3d30896f2f9a54edea17e3787549776b1b288d <0ab5c83a7df28d51a6de1fb9b859a142b2b12919

Published CVSS scores

8.2GitHubCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
CAPEC-130Excessive Allocation
T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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