CVE-2026-54894Public exploitHinoki check available

Node crash via unbounded binary-to-atom conversion

Published Aug 1, 2026 · Updated Aug 1, 2026

Resource exhaustion in ueberauth Guardian before 2.4.1 allows remote attackers to crash a BEAM node through varied namespace keys. Guardian.Plug.Keys passes binary key values to String.to_atom/1 in base_key/1 and key_from_other/1, permanently interning each distinct value. Exploitation requires an application to derive Guardian's key option from attacker-influenced input; static or hardcoded namespace keys are not exploitable.

CVSS severity6.9
Medium
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 ueberauth Guardian before 2.4.1 allows remote attackers to crash a BEAM node through varied namespace keys. Guardian.Plug.Keys passes binary key values to String.to_atom/1 in base_key/1 and key_from_other/1, permanently interning each distinct value. Exploitation requires an application to derive Guardian's key option from attacker-influenced input; static or hardcoded namespace keys are not exploitable.

The record

CVE
CVE-2026-54894
Published
Aug 1, 2026
Updated
Aug 1, 2026
Vendor
ueberauth
Product
Guardian
Classifications
CWE-770, T1499
Attack vector
Unavailable
Privileges
unauthenticated

Timeline

How it unfolded

  1. Aug 1, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 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=0.1.0 <2.4.1
  2. Affected versionversion=7126fa433afc2563fcac0c9aa35193965f8fd5f8 <2952657e42e6341a67e6aaad09d8f0b40ae917cb

What conditions does exploitation require?

Attack vectorUnavailable in this record.
Required privilegesunauthenticated

What is affected?

ueberauth · Guardianversion=0.1.0 <2.4.1; version=7126fa433afc2563fcac0c9aa35193965f8fd5f8 <2952657e42e6341a67e6aaad09d8f0b40ae917cb

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.9EEFCVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
VectorUnavailable
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-770Allocation of Resources Without Limits or Throttling
T1499Endpoint Denial of Service

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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