CVE-2026-94201Network attack vectorHinoki check available

BEAM node crash via unsafe atom filter coercion

Published Oct 5, 2026 · Updated Oct 5, 2026

Denial of service in Ash Framework before 3.34.3 allows remote attackers to crash a BEAM node via crafted atom-attribute filters. During filter comparison, Ash.Type.Atom falls back to cast_input/2, which interns each distinct string when unsafe_to_atom? is true, eventually exhausting the permanent atom table. Exploitation requires an application to expose attacker-controlled filtering of a public atom attribute configured with that constraint; the crash interrupts every application on the affected node.

CVSS severityUnavailable
Unscored
EPSS probability0.30%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Denial of service in Ash Framework before 3.34.3 allows remote attackers to crash a BEAM node via crafted atom-attribute filters. During filter comparison, Ash.Type.Atom falls back to cast_input/2, which interns each distinct string when unsafe_to_atom? is true, eventually exhausting the permanent atom table. Exploitation requires an application to expose attacker-controlled filtering of a public atom attribute configured with that constraint; the crash interrupts every application on the affected node.

The record

CVE
CVE-2026-94201
Published
Oct 5, 2026
Updated
Oct 5, 2026
Vendor
Ash Project
Product
Ash Framework
Classifications
T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 5, 2026CVE publishedPublication date reported by the CVE source.
  2. Oct 5, 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?

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  1. Affected versionversion=2970ba3bd5d36d6ad04c731ac87385375d457147 <5282f3f513053628cdd1bf2236ea22d975d934d4
  2. Affected versionversion=3.5.1 <3.34.3

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Ash Project · Ash Frameworkversion=2970ba3bd5d36d6ad04c731ac87385375d457147 <5282f3f513053628cdd1bf2236ea22d975d934d4; version=3.5.1 <3.34.3

Published CVSS scores

No CVSS assessment is available in this record.

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.

Activity data is delayed. The latest report is Sep 28, 2026.

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No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1499.004Endpoint Denial of Service: Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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